Either cleanser gently de-glosses the clear coat and lightly etches the surface for adhesion. Use circular or cross-hatch motion. Don't linger with your sandpaper on any one section for too long. If this was a two-stage paint, you would only be sanding the clear coat and the water will only turn milky. Be sure your surface is clean and dry (remove all contaminants), Use only when temperatures range between 50F and 90F where relative humidity is below 85%, Begin and finish spraying off the object using a side-to-side sweeping motion, overlapping your spray slightly with each pass. How to Glue a Wood Frame to the Surface of a Mirror, How to Use Water Based Paint or Lacquer on Furniture, Auto Detailing Network: Wet Sanding Using a Powerful Yet Dangerous Tool, Auto Detailing Network: What You Should Know About Clear Coat, How to Remove a Surface Scratch From a Stainless Steel Grill, How to Level a Floor That Bows at the Joints. Wet the sandpaper in clean water and begin sanding the the damaged clear-coat with smooth, even strokes. As a landscape builder, he helped establish two gardening companies. Then, reshoot those areas with primer. 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. Sand by applying a firm, steady pressure to the sanding block and moving in straight lines so you can see the sanding scratches. I used 3M 600 grit wet sanding paper to make small circles and knock the bumps down. It took a long time to get to this point and there is so much left to do. Spray the paper itself, then start gently sanding the body of the vehicle. I would not recommend dry sanding. Sanding and polishing clear coat overspray, The center channel stand I made had a lot of strange angles and surfaces, which made painting without overspray very difficult. Wood surfaces such as baseboards can get pretty roughed up over time. Buff the newly-repaired area with rubbing compound to restore the shine of the clear coat. 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. Thanks for the article. A nitrocellulose clear coat is highly recommended. Soak a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes. Sanding can be a time consuming process, so plan to spend some time on this step. 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. This will ensure you don't put too much lateral stress on the paint layer. This is to replace the orange peel with finer and finer scratches, which will eventually be filled in with polish. Color sanding is just a term used, it's sanding the clear coat flat with 1000grit and finer paper, then buffing it out with compound. 3 years ago. It is often a step in polishing cars and other items. Wet sanding and polishing will get rid of that as well. This will help you distinguish the sanding scratches from the one you are trying to remove. 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. While it is soaking, … If your fingernail catches, however, the scratch probably extends all the way through to the base coat. Therefore, new paint layers hang on subsequent wet layers and gravity does the rest to pull the paint down the vertical surface. Wrap the wet sandpaper in the sanding block and begin sanding the surface using a slightly firm back and forth motion. 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. Use an 800 grit sandpaper to sand the clear coat down and leave a surface area that is roughened up. You can repair some clear coat damage by using a degreaser to remove any wax that might be present on the vehicle. You should go about an inch past the clear coat damage. Regular primer can be wet sanded after about 10-15 minutes. If the surface is relatively pristine and you wish to remove the clear coat, start wet sanding using 1000-grit sandpaper. I hear of some people sanding down to 600, 800, or 1000, some even sand paint over 1500. This step is pretty standard since you'll simply follow the same steps you did the first time you painted, which can be found on the back of the can you're using. My garage was very cold when I was painting the metal, which caused a couple of problems with the Rustoleum spray paint I was using. today we debunk the myths and shed the fear! Then take painters tape and tape off the area where you will be working. Wash and dry the area again if necessary to remove streaks. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. You can perform wet sanding once or refine the enamel with successive sanding. The sanding steps help diminish the clear coat until the entire surface is smooth. Make sure that when you’re applying your coats of clear coat that you do apply the coat as thin as you possibly can, applying the second layer after the first layer has dried, and so on. Be careful not to sand too deep. If your base has any metallics in it, you're asking for trouble sanding it. Keep the surface moist while you're sanding by frequently spraying it with water. Wet sanding will turn your new enamel paint job from a spotty, uneven mess into a glazed finish that will make your car gleam. 4 How long do you have to wait for the spray paint to cure enough to start wet sanding? An interesting article giving a detailed account on how to fix and polish spray paint. Wet sanding makes the surfaces smoother. So, I've been working on the final stages of the center channel stand I'm making for my Definitive Technology CS-8080HD center channel unit and I paid the price by rushing. If you sand too hard, you can ruin the top coat and will have to repaint the car. I clear coated my car yesterday, it orange peeled how long should I wait before sanding, and should I recoat? Share it with us! While on the other hand, with base coat and clear coat, you will have to sand a little bit more. Attach a coarse abrasive disc to your sanding machine - such as P60 grade - for initial sanding. Wet sanding can be as scary as using the rotary to some. Colors take a little longer. 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. You need to wet sand clear coats with very fine sandpaper. It will probably adhere well enough to have a single layer. DRM Motors is one such service centre that can assist you in getting the painting done. After working on each section, use a rag soaked in a solution of water and car soap to keep … Here I'll show you how to sand down the sags to a smooth surface and then repaint. Remove the sandpaper from the water and wrap it around a sanding block. Sanding is the process that keeps the topcoat smooth and removes the "orange peel" look. Drying time. If you can't catch your fingernail on a scratch, you can usually sand it out. As you work away from the damage make your sanding … I'll show you how to sand and buff the clear coat back to a shine. The goal is to try and not go beyond the primer layer. Soak a sheet of 1200-grit wet/dry sandpaper in water for 10 minutes. If you apply the right primer for the job, this is all the surface prep you need. 1200-, 1500- and 200-grit wet/dry sandpaper. The surface … Here is how to fix those mistakes (hopefully you won't make them in the first place). Now, let’s talk about Wet Sand & Dry Sanding Techniques When Prepping for Base Coat Painting. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. The reason is because enamels, acrylic enamels, synthetic enamels in general are thicker and they fill the tooth of the sandpaper a lot easier. If you're having trouble removing a scratch, you may need a more aggressive grit of sandpaper. Look for any peeling, delaminating, or flaking in the old clear coat. Reply Also, be sure to add a pump or two of liquid soap in your water bottle to help glide over the surface. Move up to 800 grit sandpaper, and then 1,000 grit, and finally 1,200 grit. Although it can be time consuming, color sanding will give your car a mirror-like finish. Design and 3D Print a Modern and Cozy Reading Light! Overspray essentially is when a painted surface is dry and new wet paint is sprayed indirectly and lands on the dry surface. If you find the coarse attachment cutting too hard, switch to a lower grade, but make sure the entire surface has been cut to the same level. We are literally on the final stages with paint. Examine the surface for signs of wear-through before you continue. The clear coat should be wet-sanded with 400 grit sandpaper. If you're sanding out a scratch in the finish, move the paper at a 45-degree angle to the scratch. To achieve a glossy shine on the car, you have to remove the orange peel by sanding the clear coat. You can sand for adhesion and spray a new coat of clear over the base, but it will never lock in, and it will always sit on top of the old clear at the edges. When you are done, the surface will have a uniformly dull, chalky appearance. Most factory paint jobs can handle a repaint with out stripping the entire car to the metal. Avoid overheating the surface when you are buffing it or you may damage the base coat. Lack of sanding could make clear coat peel, but that's not your problem. Once you have gone over the surface, switch to a finer grade such as 180-grit and go over the surface again. Clean the clear coat with trisodium phosphate or an environmentally sensitive alternative labeled as a TSP substitute. just fix the dents , 320 the car to prime, water sand with 400 to 600 grit . If you find damage, use 400-600 grit sandpaper and an orbital sander to wet-sand off all of the old clear-coat. Then, wrap a sheet of the wet sandpaper around a sanding block and sand your car in small sections. Soak the sandpaper in a bucket of clean water for 10 to 15 minutes. Start by liberally spraying an area a couple of square feet in size with your water-filled spray bottle. Do not spend too much time in one area; you need to take off only the clear-coat layer. Sanding and polishing clear coat overspray. When the water begins to turn milky, stop sanding, wipe off the surface and dry it with a blow-dryer. You may be wondering if sanding a clear coat is something that you can handle; then, the absolute answer is yes. Automobile manufacturers have been clear-coating since the 1950s, but modern clear coats are harder and thinner than the original lacquer finishes. We’re now going to sand it all down with 400-grit, get all the minor imperfections with glaze putty. 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. The clear says it should flash for 25 minutes. The new clear coat will never be as strong as the original and will fail much quicker. Wipe on a TSP solution, then allow it to sit for about five minutes before rinsing it off. Once your stain or your paint has dried for a week, you should apply a clear coat to your instrument. Their experts do a fine job and thus have many satisfied customers. This is also a good step if your project retains some overspray from previous spray paint applications. Incidentally, this is not popular advice, but I don't think you actually need more than a single layer with Sprax Max 2k. The result (especially with a clear coat) is a dull and speckled surface rather than a smooth glass finish. © Copyright 2020 Hearst Communications, Inc. 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. The clear coat creates a strong chemical bond with the still slightly “wet” paint and locks in. While that’s soaking, wash and dry your car so the clear coat is fully exposed. The polishing helps smooth out the scratches made by the sandpaper. 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