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