Automotive Refinishing: Automotive Refinishing<div><br>Number 1 is used for paint removal.</div><div><b></b>Number 2 for feather edge (prepare paint for primer to prevent a rough edge, sand each layer until smooth).<b></b></div><div><b></b>Number 3 for preparing the repaired area for primer by reducing scratches and expanding the feather edge.<b></b></div><div><b>Number 4 for finalizing the sanding process.</b></div><br>