Wet sanding your car’s paint finish isn’t as scary as it seems. Choose an open, outdoor area that will allow you to run water continuously for extended periods of time. Use 1000-2500 grit fine sandpaper (depending on the severity of the paint imperfections), garden hose or bucket, clean rags.
The actual task of wet sanding is pretty painless. It does not require much force or pressure to be applied to the paint in order to smooth the finish. Working in small, light passes around the problem area tends to be the most effective method. Heavy swipes can dig into the paint and cause excessive scratching. So go slow, and take it easy. After you’re satisfied that you’ve smoothed out your paint’s surface and any imperfections, use a high quality Carnuba based wax to restore that original luster.