The clear coat creates a strong chemical bond with the still slightly “wet” paint and locks in. Wipe on a TSP solution, then allow it to sit for about five minutes before rinsing it off. You can perform wet sanding once or refine the enamel with successive sanding. If you are getting color in a two-stage paint, that means you sanding through the clear coat and have damaged the finish. You can always try another round of wet sanding and polishing, but once you hit the base coat, you've got a problem and need to repaint. Soak a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes. While it is soaking, apply masking tape to areas you don't want to sand, such as moldings and panel edges. Incidentally, this is not popular advice, but I don't think you actually need more than a single layer with Sprax Max 2k. My last coat was at 8 last night, it orange peeled pretty bad, Should I wait for it to cure before i sand it and add another coat?, Can I go back now and add a coat before I buff down the orange peel? Keep the surface moist while you're sanding by frequently spraying it with water. Most factory paint jobs can handle a repaint with out stripping the entire car to the metal. In my case, I had so many overlapping spray angles, that the mist from the clear coat spray settled on a dried surface and made it dull. Sanding is the process that keeps the topcoat smooth and removes the "orange peel" look. An interesting article giving a detailed account on how to fix and polish spray paint. Although it can be time consuming, color sanding will give your car a mirror-like finish. Move up to 800 grit sandpaper, and then 1,000 grit, and finally 1,200 grit. http://CollisionBlast.com - What grit of sandpaper to use when block sanding primer surfacer and final sanding a car to prep for a paint job. After working on each section, use a rag soaked in a solution of water and car soap to keep … Lack of sanding could make clear coat peel, but that's not your problem. I would not recommend dry sanding. When you are done, the surface will have a uniformly dull, chalky appearance. It is that good of a product. When you apply spray paint too fast, too heavy, too cold of a climate or too humid of an atmosphere, you can get sags in your paint. Wash and dry the area again if necessary to remove streaks. It is only after the clear coat has set so that you can go ahead to sand and buff. If you decide to repaint the wood surface, you can smooth it out using a medium grade sandpaper such as 120-grit. You can repair some clear coat damage by using a degreaser to remove any wax that might be present on the vehicle. The goal is to try and not go beyond the primer layer. The important thing here is to go slow and not burn through the clear coat. As a landscape builder, he helped establish two gardening companies. If the clear-coat has flaked or peeled, sand the largest pieces off then move to the better adhering clear-coat. If you can't catch your fingernail on a scratch, you can usually sand it out. Now, let’s talk about Wet Sand & Dry Sanding Techniques When Prepping for Base Coat Painting. Here is how to fix those mistakes (hopefully you won't make them in the first place). If you wet-sand the base coat, wash the vehicle with soap and water after this step, not before. I'd wait at least 30 minutes, if not an hour before wet sanding any spray paint colors. Step 4: Continue wet-sanding with higher grit sandpaper. It took a long time to get to this point and there is so much left to do. Wet-sand off all of the previous clear coat if it is damaged. I spent 13 hours on this car to get it primed up, finish all body work and ready for paint. Use circular or cross-hatch motion. Then, wrap a sheet of the wet sandpaper around a sanding block and sand your car in small sections. If your base has any metallics in it, you're asking for trouble sanding it. Then, soak 2000-grit sandpaper in water for an hour before sanding around the damage to blend the repair area with the clear coat. The clear coat should be wet-sanded with 400 grit sandpaper. Thanks for the article. Their experts do a fine job and thus have many satisfied customers. If you're having trouble removing a scratch, you may need a more aggressive grit of sandpaper. In order to avoid any further sagging or peeling of the paint, you could consider ceramic pro coats for the surface protection of the car. They typically look like this (varies among manufacturers): If your project has any orange peel (not quite perfect mirror finish), you might want to bring out the shine with the use of some wet sanding and machine polish. In this video I am going to not only show you how to repair peeling, chipped or worn out clear coat. We are literally on the final stages with paint. You may be wondering if sanding a clear coat is something that you can handle; then, the absolute answer is yes. Here I'll show you how to sand down the sags to a smooth surface and then repaint. Therefore, new paint layers hang on subsequent wet layers and gravity does the rest to pull the paint down the vertical surface. While that’s soaking, wash and dry your car so the clear coat is fully exposed. How long do you have to wait for the spray paint to cure enough to start wet sanding? today we debunk the myths and shed the fear! Automobile manufacturers have been clear-coating since the 1950s, but modern clear coats are harder and thinner than the original lacquer finishes. To fix a peeling clear coat on your car, start by scrubbing the peeling area with 1000-grit sandpaper to get rid of the damaged coat. Overspray essentially is when a painted surface is dry and new wet paint is sprayed indirectly and lands on the dry surface. Remove scratches left by the sandpaper by following up with 1500-grit sandpaper and then 2000-grit sandpaper, wetting the paper and the surface in the same way as you did before. If you're sanding out a scratch in the finish, move the paper at a 45-degree angle to the scratch. Scratches that don't extend through to the base coat can usually be removed by sanding, but you must take care not to remove too much of the clear coat, or you'll compromise its ability to block UV rays. As you work away from the damage make your sanding … Use an 800 grit sandpaper to sand the clear coat down and leave a surface area that is roughened up. Share it with us! Use a smooth motion, not stopping or moving too quickly, to remove the outermost layer of paint. You should go about an inch past the clear coat damage. When the water begins to turn milky, stop sanding, wipe off the surface and dry it with a blow-dryer. The surface … This occurs because the underlying layers have not fully flashed, which means the solvents in the paint have not had a chance to reach the surface and allow the paint to dry. Start by liberally spraying an area a couple of square feet in size with your water-filled spray bottle. 3 years ago. To achieve a glossy shine on the car, you have to remove the orange peel by sanding the clear coat. Soak the sandpaper in a bucket of clean water for 10 to 15 minutes. Wet the area you're going to sand by spraying water from a spray bottle. If you find damage, use 400-600 grit sandpaper and an orbital sander to wet-sand off all of the old clear-coat. just fix the dents , 320 the car to prime, water sand with 400 to 600 grit . Wet the sandpaper in clean water and begin sanding the the damaged clear-coat with smooth, even strokes. Once you’ve applied the fresh coat, leave it for 24 hours to harden. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Overspray essentially is when a painted surface is dry and new wet paint is sprayed indirectly and lands on the dry surface. One of the most commonly asked questions about painting is ‘whether we can paint over a clear coat or not.’ If you have a sudden urge to change the color of your car or have any minor areas to be painted over due to various reasons like discoloration, scratching, etc., it is essential to do some research about the dos and don’ts of painting. If you apply the right primer for the job, this is all the surface prep you need. Did you make this project? While on the other hand, with base coat and clear coat, you will have to sand a little bit more. Extreme care must be taken when sanding and polishing near corners and edges so that you don't cut right through the clear and even possibly the base coat. 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