What sandpaper to use on car?

For painted surfaces that just need to be cleaned up you can remove chips with 220 grit wet sand paper and then apply primer. Once you have primer on the car you can sand with a 400 to 600 grit sandpaper just before you apply paint. Use the 400 grit paper to block sand and remove any primer runs then 600 grit to provide a good surface for the paint. read more

To use a sanding block properly, hold it with both hands and slowly sand the flat surfaces of your car. Sand in slow, deliberate and even strokes. This will allow you to slowly sand away the paint and primer. Carefully sanding with a sanding block will also reveal any high or low spots that may be on the surface of the vehicle. 3. read more