Wet sanding makes the surfaces smoother. Keep in mind these finishes are designed to fail by chipping to the primer layer preserving the substrate beneath.
Sand A Car For Paint What Grit Of Sandpaper To Use When Blocking And Final Sanding
Sanding primer before base coat. The thickness of base and clear layers have greater impact on chip resistance than mechanical adhesion with the primer. Theyre diy friendly so you can prep your trim yourself and still get professional looking results. A good paint job is 90 percent prep work. These tips show you how the pros do it. Then reshoot those areas with primer. Wet sand the base coat before starting the clear coat.
For larger vehicles double those amounts. As a starting point if you are sanding a coat of rough primer you can start with a 400 grit sandpaper to knock down all of those little bumps. I like to wet sand for final painting so if youre sanding a 2k primer an epoxy or even a clear coated surface or maybe if you have a car with an already nice paint job on it say you have a red car with a nice paint job but youd like to put a different red hue on it or some kind of metallic maybeall you have to do really is scuff down the clear coat with 400 grit then you can lay your base coat and clear coat right on top of that. Do not scuff the base coat beforehand. Now lets talk about wet sand dry sanding techniques when prepping for base coat painting. It is often a step in polishing cars and other items.
If you wet sand the base coat wash the vehicle with soap and water after this step not before. Ultimately the goal of the sanding if trying to get rid of raised grain should be a smooth wood finish. The old adage a good paint job. Were now going to sand it all down with 400 grit get all the minor imperfections with glaze putty. Yes sanding is required. After some time with the 400 grit you can move to a 600 grit paper to give yourself a nice smooth surface to work with when you are painting the car.
Once the base coat is smooth and clean start spraying on about three to four layers of clear coat. For a small to medium sized car youll need 1 gallon 38 l of primer 3 gallons 11 l of base coat and 2 to 3 gallons 76 to 114 l of clear coat. Buy enough primer base coat and clear coat to cover your vehicle. I spent 13 hours on this car to get it primed up finish all body work and ready for paint. If you are looking for a better overall finish the smoother the better which can at times require sanding the wood with a primer on it with up to a 600 grit sand paper. Do you want your old trim to look fresh smooth and crisp after youve painted it.
Gallery of Sanding Primer Before Base Coat
