If you cut out and paint your own bodies, then you may be interested in the PROTOform Better Edge Sanding Drum. This sanding drum, which attaches to your rotary tool, was specifically designed to smooth out the rough edges you get when you cut out your wheel-wells. The kit includes an Anodized 6061-T6 Aluminum drum, an Anodized 6061-T6 Aluminum drum cap, a Tool Steel mandrel, a 120 Grit Silicon Carbide Spiral Sanding Band, and 2 Rubber o-rings. Head over to PROTOform for more details.
Better Edge System: Sanding Drum