What You Need Auto Putty Dremel Flex-Shaft Attachment #225 Primer Paint Fine Grade Wet/Dry Sandpaper 1. Clear away rust and loose paint with a #500 aluminum oxide abrasive wheel and #428 carbon steel brush. 2. Fill the depression by smoothing on body putty in thin, even layers. 3. After drying, sand away excess putty with #407 drum sander and #408 sanding band. Feather edges to existing paint by hand with fine sandpaper.4. Apply primer, overlapping into existing surface. Let dry and lightly hand sand. Apply several coats of finish paint, lightly sanding in between.Courtesy of Dremel Tools – Back to Top – News source: Do It Yourself