(Image by NASAracer) Here is the result after sanding. I wouldn't because it is a huge job and not always necessary. Coating failures after soda blasting can usually be traced back to no pre-paint preparation or poor preparation or incorrect preparation. Damaged interior wood trim will need repair after the initial sanding. Four coats. I was going to blow off all the sand that I could with a blow gun, wash the car with warm water, Dawn soap and a red scotchbrite pad, and then follow with waterborne w/g. Automotive Paint Primers. I suppose you don't have to sand a high build primer but it's whole purpose is to put several mils of material down so that you can block it out slick and smooth. your right about dry sanding the run after you mess up. Let one half sit in the water for about five minutes before you begin, then wrap your sandpaper around your sanding squeegee. Bad Credit Installment Loan Make use of pegs to opening the tinsel in position whilst the stuff dries, and after that take away the pegs. 5 out of 5 by 2. Sand the primed surface after it has dried. You should have at least 3 mils of primer left over after block sanding to protect the body filler or busted feather edge from solvent attack. Primer For Coatings: For use as a primer for coatings (such as asphalt, coal tar, or acrylic pavement sealers) dilute Asphalt Binder with water as follows (based on 10 gallons for ease of calculation): Asphalt Binder- 10 GALS. so right now its a million different colors. covers sanding marks, prevents bleed through, fisheyes, etc. Two cans on a bike frame is a LOT for a single application of primer. Different methods may apply if you are painting a small flat surface (Tele) compared to a car. Finish off by "wet sanding" the entire pant outside surface with 400 grit Wet or Dry sandpaper. A scale modeller will be trying to preserve as much surface detail as possible whereas car primer is intended to cover and hide any surface imperfections. Some do it over epoxy primer, while others will only do it on bare metal. Primer Sealer. Still, somehow, someone managed to commit the unforgivable. Wet sanding will turn your new enamel paint job from a spotty, uneven mess into a glazed finish that will make your car gleam. Change to medium-grit paper for smoothing. Apply multiple thin coats to prevent runs and drips. Hobby Auto Restoration: Primer and Sanding: A few years ago, my family and I restored a 1976 Camaro. After your last layer: let it dry for a 1 or 2 days (the longer, the better). I suppose you don't have to sand a high build primer but it's whole purpose is to put several mils of material down so that you can block it out slick and smooth. There are several reasons why it is a good idea to apply a masonry primer before paint. Without sanding the surface in advance, the new coat of paint won't stick to the previous layer. If all other methods are not effective/ fast enough sanding paint with 2000 - 3000 grit sand paper may be an option but it would require sanding mark removal and gloss restoring polishing after. You will want to avoid any rooms where there may be a lot of dust, particles, or dirt flying around, because the contaminants could stick to a layer of primer or paint and create imperfections in the finish. after the clear is cured, (thirty days at least) wetsand with 800, 1200, and 1500 or 2000, then polish. Lower-numbered grades denote. Rust Tough Primer dries to the touch in 20 minutes and a topcoat can be applied after 30 minutes. Stonechip Primer 1109-1240/6, and Glasurit EP Primer 801-1552. after color and clear is done my painter has started to complain he doesnt really want to wet sand and polish the whole car because of the amount of work involved and thinks it will look fine anyway. I've used Zinssers products for years to block stains, with excellent results. Also good on spot putty. Not sure about the clear/base coat but this should work too. i usually sand primer after about 15 minutes then leave it set another half hour then re wash let dry and paint. base coat with pearl or metallic - do not sand, if you get bad dirt nibs you can spot sand with like 1000 but you have to spray another coat. you may find yourself going from this step back to spraying primer surfacer several times, depending on how smooth you want your final paint job to be. Do not over sand! After leveling, use 3000 grit wet and dry sand paper to remove the 1500 grit sanding scratches. Compounding and/or wet sanding are possibilities but keep in mind that you don’t want to remove too much of the clear coat otherwise you will sacrifice it. A panel sealed in two (or even better 3) coats of epoxy can sit for years and then just need some 80-180 grit sanding to cut the film and your good to go with your filler or to start. This is a good idea when the final color is much lighter. Hobby Auto Restoration: Primer and Sanding: A few years ago, my family and I restored a 1976 Camaro. Anyone with a good car don't need When it dries it dries to a perfectly smooth finish and requires no sanding for all but the most. My personal thinking is if this is a totally urethane primed componant or car, there is no need for sealer. This will allow you to slowly sand away the paint and primer. What do you recommend to fix the issue? Answer: Sanding will take surface bubbles out, but buffing with a floor machine will not be aggressive enough. Also used for fine sanding spot putty. Definitely use a primer / undercoat. I won't go into how to do it, but this is the step that separates MAACO from trophy finishes. sometimes as fine as 600 if its really high end, and im using a lacquer or varnish. The guide coat will tell you where the low spots are. Wet sanding will turn your new enamel paint job from a spotty, uneven mess into a glazed finish that will make your car gleam. detailing your car's exterior product information about spray cans, pens, and touch up bottles the wonders of clear coat blender all about body filler and putty what you should know about paint! common questions & answers touch-up paint faq answers to common touch up paint problems problem: paint has no gloss or shine how to store paint properly. Dry the surface. What do you recommend to fix the issue? Answer: Sanding will take surface bubbles out, but buffing with a floor machine will not be aggressive enough. Before you proceed with sanding it's wise to check how much paint is left in that area and paint thickness gauge (PTG) is needed for that (unless it's. A good primer should leave a very flat kind of plastic looking surface. What color primer do you need? Primer comes in three standard colors: black, white, and. If your primer is pretty thin in areas, you might want to spray another coat or 2 before you start sanding with the coarser grits so you don't break. Thinking about sanding between coats on a touch up paint project? Think again. Allow to cure 24 hours. Now turn the part over and check the un-primered topside. It offers excellent adhe-sion and sanding properties as well as high filling power. I have painted many cars. Step Two: After first application of high-build primer I would guide coat the entire car and block it until there were no spots of guide coat left using a board file and 180 grit. Sanding is an. Finish off by "wet sanding" the entire pant outside surface with 400 grit Wet or Dry sandpaper. For this reason you should not use self-etching primer on existing paint or gloss finish. Each time you sand you use a slightly higher grade of sand paper. I would sand the surface after filler. This is the stage to correct all the flaws in the body. I'm no bodyman, but what I learned is epoxy primer, filler, sand, high build primer/filler, wet sand, prime, sand, prime, sand, prime until you can't fucking stand it anymore. Prep the part, clean it, AP, primer, shoot some color, clear, sand and buff. Wet sanding of primer and initial old material in the 220 to 400 grit wet range is commonly done as well for preparation to topcoat, seal, or prime. I've already done a few rounds of primer and light sanding, and am ready to apply the topcoat. But if it's pretty low, chances are primer is not gonna fill it. After you've sanded the surface down real smooth, a good primer can help any paint color you apply to adhere to metal properly. Wash and dry. 3Allow primer to dry according to directions. What do you recommend to fix the issue? Answer: Sanding will take surface bubbles out, but buffing with a floor machine will not be aggressive enough. We used paint, primer and sanding supplies from automotivetouchup. After blasting, the car must be immediately sprayed with heavy duty sealer-primer, or delivered to the body shop for work. I was told the best technique is to apply 2 coats epoxy (I applied three heavy coats), block sand with 120, fill low spots apply another coat of epoxy, block with 180, fill low spots if any remain, block with 220 and then finally. of USG Sheetrock® Brand Sand Finish Paint Additive (or similar fine perlite aggregate) per 5 gal. Order Halfords Wet & Dry Sanding Paper 15 Read reviews, reserve or buy online. To avoid the headache of trying to match the paint you want to apply to the existing paint on the car, you’ll need to remove the primer and expose the bare metal. To use a sanding block properly, hold it with both hands and slowly sand the flat surfaces of your car. Follow-up with a tack rag just before priming. Rinse frequently and wipe gently to avoid marring the new joint compound finish. Do you want to paint the engine bay, trunk, or inner doorsills? To achieve the best finish, sand the entire car. Okay, next step is to get some sanding blocks. Use DX-330 to remove wax & residue. ) Weathered Wood. Wet sanding, also known as color sanding, adds shine to a finished paint job. It was sanded down nicely but only to the paint not down to the metal or primer, we dont want to do that. The Original Car As you can see from area 1 on the car, the original car has plenty of rust and its old paint work. Get some contrasting color rattle can primer, and dust the entire surface with a very light mist. I used a Hutches finishing dual action sander for the large panels and a six inch hard foam sanding block for the tight spots. Just refinish the old ones. I was wondering what primer I should use after I put aircraft paint remover ont the car? I will be taking pieces off the car to strip and it will be a long process. Properties of a Primer: * A Primer protects the surface and a Finish paint protects the primer. But in situations with poreous materials like wood, the extra moisture will cause all sorts of problems. Automotive paint primer is a type of paint designed to act like a base coat. After Blast is designed to clean, degrease and etch freshly blasted or sanded metal prior to painting or powder coating. Block sanding takes place after any body damage has been repaired and fillers have been applied, such as bondo or glazing compounds, and the car is in primer. If your primer is pretty thin in areas, you might want to spray another coat or 2 before you start sanding with the coarser grits so you don't break through. As long as you sand enough to remove the sheen, the primer and paint should stick. Then make sure you wipe it down and blow it off good before applying the first coat of paint. Small areas can be sanded dry but a finer finish and extended abrasive life is achieved by wet sanding. This is to provide a neutral surface to ensure that paint colors show true. How To Buff Out Paint Scratches on Collector and Vintage Cars. Contamination from salt residue, eg dirty sanding water or hand sweat, was left on the surface under or between coats. After this has been applied, wrap a 6-inch-long stick with 400-grit sandpaper. Allow to dry. through," with a spray can of fast-drying oil-based primer. Eliminating rust before painting After a few minutes. I sand and then prime when I am looking for a very durable final surface; an antique tubular steel hospital bed I re-painted recently got the full treatment: sanding, several coats of primer sanded lightly between each coat, then several final coats of Krylon. Re-coat and sand with 220 then 2 wet sands. Take home furnishings from drab to fab with a fresh coat of paint and this guide for how to paint wood furniture. A 16 inch board and a 4 inch block. 00 0 items. However, depending on the products you are using, this could vary slightly. Sand the surface smooth with fine grade of sand paper (280-320). After drying of the sealer coat, sand the area(s) with 320 dry. It's primer dust. Again, start at the top of the wall and move downward. Primer Sealer. It often takes 2 to 3 times of priming and sanding to get a car real smooth. Before you start sanding and applying primer, decide what you want to paint. Part 2 is let dry and pole sand to smooth it out. The panelbeater obviously cannot follow the exact methods of a production line since they may be dealing with ten different makes of car in ten different colours every day, each requiring only limited areas of paint renewal. If sanding doesn't reveal the primer's presence, try reading the box it came in. It is an oil based, but dries to re-coat in 30 minutes. True Lacquer primer can be sanded in a matter of 20 minutes, (+ or - ) with proper drying times and conditions, and correct build up. Final sanding before applying colour coats is generally carried out wet using the appropriate fine grades of WetorDry abrasive paper. A heat gun can speed up the hardening of the filler. Make sure you prepare the car in a well-ventilated area so you do not have to keep moving it. You can use any primer after applying ESP, there isn’t a specific one we’d suggest but there are many manufacturers who produce appropriate primers. It creates a smooth finish that is free from any imperfections and allows paint to adhere better. Avoiding Swirl Marks in Finish Sanding The only thing i use fresh 220 for mainly is sanding first coat of primer. Sanding and Buffing. Our primer paint works great over freshly sand blasted metal, body filler, on fiberglass, and will fill minor scores and surface imperfections. Soooo, how does the aerosol can high build primer, such as that by SEM, compare with two part spray gun high build primer such as Omni by PPG ? Is the two part. I too thought about wet sanding the car before applying my 2k high build primer, gotta find a way to stop clogging the paper. If you want a quality finish, this is a crucial step. After blocking the entire hood sanding out any minor low spots, I spray another two coats of primer and guide coat a second time. Pass over the car several times on the first coat. Different methods may apply if you are painting a small flat surface (Tele) compared to a car. After sanding with 220, you may sand again with finer paper, such as 320, 400, or even finer depending on how crazy you are :-) Remember, paint will NOT hide anything, but rather, make your surface preparation MORE visible. Apply primer to any place where bare metal or plastic is showing. Thanks for the info, now I'll hit it with solvent based w/g also. if the paint is a silver, you're safer sanding the primer with 600. Do not put a lot of paint though - or it will be visible even after second wetcoat. This guide covers arguably the hardest method — rolling on the paint with a roller. The college actually practices the motto"Knowledge. That will raise some hairy fuzz, so after drying a couple of hours give it a once over with 60 grit to defuzz it. Do not pre-coat with primer or wood sealer. (Image by NASAracer) Here is the result after sanding. Im painting a bicycle, with car paint, since the urethane has to be bought just before you use it, i decided to paint my frame with base coat and do the clear some other day when i had time a good friend told me, this was wrong. Our primer paint works great over freshly sand blasted metal, body filler, on fiberglass, and will fill minor scores and surface imperfections. This is known as wet sanding. If the primer drips or goes on chunky, lightly sand the surface to smooth it out. No, just sand it down till you are happy with it. After you get the car completely covered in primer and it has had sufficient time to dry, wet sand with 400 grit cloth-backed sandpaper. Spray painting & respraying a car. How To Wet Sand By Hand To Paint A Car Youtube. Wet sanding is an amazing process that, when done properly, can result in a surface that's as smooth as glass. It can be a daunting process to sand off the paint on your car, determine what primer to use on the car and then paint and finish it, but it’s one of those jobs where things must get worse to get better. I'm no bodyman, but what I learned is epoxy primer, filler, sand, high build primer/filler, wet sand, prime, sand, prime, sand, prime until you can't fucking stand it anymore. Best Automotive Sandpaper Grits To Use for Each Car Paint System – Day 2 Boot Camp. Then feather the peeled edges with 120-grit sandpaper. @ Lifetime Access How To Wet Sand A Car After Primer For Beginners And Advanced From Experts | Made Easy Free Download PDF Teds Woodworking Plans. Below: After first mist coat of Tamiya TS-42. Unfortunately, I wont be able to paint it for sometime after the body work has been completed. DupliColor makes a good lacquer based primer that is ready to sand in 20 minutes. 17-Oct-2019 : How To Wet Sand A Car After Primer. If this is your first paint job, just makes sure your read all of the instructions on your varnishes and take your time; you will do just fine. If your primer is pretty thin in areas, you might want to spray another coat or 2 before you start sanding with the coarser grits so you don't break through. Discover classes, experts, and inspiration to bring your ideas to life. But on your car where you have high expectations, apply the color right over 500 sanded urethane primer. After the primer is set, sand the entire component again with a finer-grit sandpaper such as 180, 220, and 320-grit. I suppose you don't have to sand a high build primer but it's whole purpose is to put several mils of material down so that you can block it out slick and smooth. 600 grit Used for final sanding primer before applying the basecoat color. If you want a quality finish, this is a crucial step. This is a problem if you again go to bare steel, and water isn't fun at times like winter, etc. you'll need a few more things to make these tools actually work:. Best Automotive Sandpaper Grits To Use for Each Car Paint System – Day 2 Boot Camp. For success using dry sanding to prepare a car you must be clean. Wet sanding, progress from 600 then 1000 then 1500 then 2000, but be careful, it only takes a few passes to cut the texture off the paint. I tried to get the surface as even as possible. base coat with pearl or metallic - do not sand, if you get bad dirt nibs you can spot sand with like 1000 but you have to spray another coat. The guide coat will tell you where the low spots are. It's actually a pretty simple step in auto painting. My $1000 XJ “Bonny” (you may remember her here) badly needed a paint job, and I was low on cash. Bad Credit Installment Loan Make use of pegs to opening the tinsel in position whilst the stuff dries, and after that take away the pegs. You can decide if you want to sand the primer. After damage to a vehicle has been rectified, It is handed over to the spray shop to restore its original appearance. Choose an open, outdoor area that will allow you to run water continuously for extended periods of time. The last tip for painting plastic car parts is to make sure that you're set up in a good area. Whether you're priming a porous substance such as wood or a smooth substance such as metal, you need to sand the substance beforehand. Rust Primer is something that will prevent rust. After all of that you can apply your sanding / filling primers and begin blocking the body and after that paint. Be careful to remove it completely. The finer metallics will be more successful, but only if you have to. Apply 2-3 light coats, allowing the primer to dry between each application. Now, let’s talk about Wet Sand & Dry Sanding Techniques When Prepping for Base Coat Painting. MP282 2K High-Build Primer Surfacer Primary use: fill and sandability. What is the coverage for one gallon of Corroseal? Typical Coverage rate is 200 square feet per gallon applied at 8-10 mils wet coat. i usually sand primer after about 15 minutes then leave it set another half hour then re wash let dry and paint. Then make sure you wipe it down and blow it off good before applying the first coat of paint. Then I use the first base coats as guide coats and sand them flat. YourMechanic has a useful guide to applying a clear coat base if you are searching for extra help in getting started and applying the clear coat properly. Recoat within the minimum recoat time. A mini with not-so-good primer and good varnish will last a long time. Im no body work expert but I had thought primer does protect metal so that is news to me. you may find yourself going from this step back to spraying primer surfacer several times, depending on how smooth you want your final paint job to be. The following sanding steps will remove the previous step's sanding marks to a mirror. To use a sanding block properly, hold it with both hands and slowly sand the flat surfaces of your car. As far as sanding goes, don't do it to big flakes, the edges catch and mess the surface. EasyPaintYourCar. If blisters go down to a previous coat, remove all loose paint (by scraping or other methods), and sand the surface to smooth out any rough edges. How Wet Sand Primer And Prep Surface For Paint Youtube. we're not talking. I am hoping that I can just. If you want to paint directly on a primer base, you will need to do this step. Slick-Seal provides excellent adhesion to fully cured painted surfaces, treated and primed steel, properly prepared aluminum and fiberglass. My advice (and again - check with Behr) would be to sand the primer (120 grit) damp wipe - then apply another coat of the same primer. " Sometimes flipping the part over and. Look for high and low spots. Shiny areas on the wood's surface are called "mill glaze. Also used for fine sanding spot putty. I'm going to have the painter come back and try to fix things. A mini with good primer and not-so-good varnish will not last as long. This is called a guide coat. Since this product drys to the touch quickly you may decide to begin sanding earlier then the specified wait time but even with UV dryers it is recommended that you wait a full 30 minutes before you begin. After two coats, common wisdom seems to be to let it cure completely and sand lightly before doing another coat/hot-coat pair (if desired); I admit to being a bit cavalier about that. If you are applying a primer, you should wait about 24 hours before applying a base coat or enamel based paint. As you might guess, a primer that bonds peeling paint is not suited for use on substrates such as glass, glazed brick or Kynar. Vacuum the floor to remove the dust, and keep it from. Sanding a surface removes the top glossy layer, allowing the substance to receive the primer. Finish by wet sanding it with 2000-grit sandpaper. No matter what your project entails, 3M™ Advanced Abrasives is a full line of products ready to meet your sanding needs. I notice that the white primer does not cover well over the putty on first try but it goes the same with any white primer I think unless is grey. For success using dry sanding to prepare a car you must be clean. Wet sanding is a way to ensure that the clear coat looks as expected, enabling it to provide protection and give your car the polished look you desire. Fast drying; Good filling properties; Good topcoat. Any deep scratches in the primer can be filled with primer putty. This will help to remove any water soluble contaminants and also help to remove any contaminants that may have been ground into the plastic from Step 1. Sand again. After sanding, of course! Then comes the color coat again, after sanding, of course!(Lacquer)why Lacquer you askit's the paint dummies best friend. Sanding -> wash > degrease, before primer and before top layer. These can work well, are convenient and reasonably inexpensive (a large tin will cover several models). 17-Oct-2019 : How To Wet Sand A Car After Primer. An article explaining how to kill rust on car bodywork through the use of sanding, acids and rust kill. Apply primer to any place where bare metal or plastic is showing. When sanding enamel paint, you will use a technique called wet sanding. I would sand the surface after filler. Sand down high ridges on the gouges until they’re level with the rest of the wheel cover. I put on many coats and then hand sanded the entire body down (several times!). Allow at least 24 hours for final cure & before sanding. The finer metallics will be more successful, but only if you have to. After the primer has been applied, cleaning of the surfaces before application of the finishing coat, will improve the desired effects of paint. Next, prime the wall. At this stage sanding is done with successively finer grades of sandpaper to achieve a smooth and almost satin finish. I don't resent sanding after the undercoat/primer because it helps provide a smooth finish, but the final sand often takes the paint off sharp edges, even when I am careful, which can leave them a bit dark after the final coat. I wipe down all the panels with a clean wet rag right after wet sanding to reduce dried sludge. Use two hands to sand the car in a back-and-forth motion. Although the rocket does not need any more primer, I'm wondering if there are any advantages to applying another light coat of primer, and then applying the top coat within the 1st hour. The resins utilized in. ?? going to paint the car in acrylic cheers ben. However, the primer itself may interact with paint layers. A finer grit used to final sanding and feather edging body filler. That's the same as the original paint they used in the factory in Sweden. Use some 400 grit and wet sand it gently. The surface needs to be clean when you put on the primer. My $1000 XJ “Bonny” (you may remember her here) badly needed a paint job, and I was low on cash. This will allow you to slowly sand away the paint and primer. Understanding the types of car paint available is important to make sure you are using the best product for your application. And hopefully after that, you can get it. i usually sand primer after about 15 minutes then leave it set another half hour then re wash let dry and paint. How do I finish my DIY, single-stage paint job to a gloss? of primer, waiting a full day and sanding between each coat. Primer Worth the Price? Valspar, Behr, and Kilz Review When the car is parked and the garage door is closed after a rainstorm, the humidity and dampness has. The guide coat will tell you where the low spots are. Sanding -> wash > degrease, before primer and before top layer. A Complete Guide To Painting Plastic Car Parts Painting/spraying your plastic car parts is a great way to improve the appearance of your car and make it personal to you. Automotive Paint Primers. Do not pre-coat with primer or wood sealer. Our services Easy, Affordable & Reliable Auto Paint and Collision Repair Services. You also want to rent a handheld power edge sander for sanding tight against walls and in corners and doorways. With a single-stage paint (which I suppose rattle can would fall into) you should be able to wet sand and then polish. Wet sanding, progress from 600 then 1000 then 1500 then 2000, but be careful, it only takes a few passes to cut the texture off the paint. Our primer paint works great over freshly sand blasted metal, body filler, on fiberglass, and will fill minor scores and surface imperfections. Once the primer has dried on the front of the door, flip the door over to prime the back. you may find yourself going from this step back to spraying primer surfacer several times, depending on how smooth you want your final paint job to be. And we all lnow from experience how hard it is to get medias other that Baking Soda out of the car! How many times have you had a project sand blasted only to find sand 5 years later still there or to have it blowing back at you while your PAINTING your car?. Re: Any special prep required after sandblasting? You really get what you pay for in primer. However, depending on the paint you are using, you may need to prime it. Do not pre-coat with primer or wood sealer. Then lightly wet sand the primer with 400 grit followed by 600 grit. After applying Bulls-Eye 1-2-3 Plus to the stain, the stain may appear in the primer film. Wet sand them with 3600 sandpaper, and smooth out the paint with even higher grit (or toothpaste!). Sand, prime(2 coats depending on product/build), sand with 220 and up. Painting a wood banister or handrail can be a long process but looks beautiful in the end. Two primer coats of quick dry acrylic with a short pile mohair roller. The last tip for painting plastic car parts is to make sure that you're set up in a good area. At this stage sanding is done with successively finer grades of sandpaper to achieve a smooth and almost satin finish. Differences of Sandblasting, Soda Blasting or Dustless Sandblasting Your Vehicle. What is a mil? A unit of length equal to one thousandth of an inch. sanding will mess with the flop of the metallic. When sanding enamel paint, you will use a technique called wet sanding. The paint shrinks more dramatically in the sanding marks because of the higher film thickness; The drying times for the undercoat materials were not observed correctly: the sanding marks are clearly visible due to the swelling of the undercoat materials at the time of painting and the shrinkage after drying. Automotive Paint Primers. Each coat should be applied after a 20-minute wait (approximately). Then apply an undercoat. That’s right! Follow the six steps outlined in this article and you will see results. Where I live our winters are pretty harsh. Wet sanding is typically done after dry sanding to get an even finish. after color and clear is done my painter has started to complain he doesnt really want to wet sand and polish the whole car because of the amount of work involved and thinks it will look fine anyway. This is done to get the uneven “orange-peel” look of the paint out. Wipe the surface with a clean towel and fresh, clean water to remove all sanding dust and allow to dry thoroughly. All of our steel auto body repair panels come with an EDP coating for corrosion protection, but it is not intended to be a final coating on the body panel. Obviously if you sand through the primer to bare plastic you'll need to reapply (and resand) the primer in that area- but otherwise primer is meant to be sanded and worked until it is perfect. Our auto body paint supply store carries 3M Polishing Pads, 3M Swirl Remover, Acrylic Lacquer Primer, Dura-Block Sanding Blocks, Dura-Block Sanding Tools, House of Kolor Primer, Mar-Hyde Primer, Norton Sandpaper, Rat Rod Primer, Rust Preventive Paints, Urethane Primer, Urethane Clear Coat, Velcro Sanding Discs, Wet Look Hardeners, and so much more!. When sanding, be careful at the edges, because the coating will be thinner there and it's hard to avoid sanding right through the primer, down to the metal. I want to then prime the car, but not paint her right awaywhat kind of primer do I use?. Allow that to set for about 2 days before wet sanding with 1500 grit. Do not pre-coat with primer or wood sealer. Primer is very valuable in most cases, but if you're completing a very small repair involving minimal molestation of your car's sheet metal, primer may be overkill. Most primers have an extremely flat finish that highlights details under direct light. Depending on what color your car is, and what color you want to change it to, it may not be a bad idea to spray your car in a primer sealer before you spray the base/clear. An article explaining how to kill rust on car bodywork through the use of sanding, acids and rust kill. I'd get up in the morning and wet sand the car absolutely smooth, wash and dry it off completely, and then roll on a coat. Each primer coat should be allowed to dry at least 48 hours. Sanding after the 2nd coat with 220 grit. Block sanding with a guide coat will find low spots no thicker than a piece of paper, palm sanding will only deepen it and cause a wave in the finish coat. Best Automotive Sandpaper Grits To Use for Each Car Paint System – Day 2 Boot Camp. It creates a smooth finish that is free from any imperfections and allows paint to adhere better. After sand blasting, prep the aluminum with a metal prep you can get this at an automotive paint supply shop.