This patterned, precise surface on a lightweight foam removes very fine sand scratches and leaves metal and painted metal surfaces ready for polishing. Ideal for hand or machine sanding. Use it on metal, plastic, body filler and fiberglass. Contains sandpaper made with aluminum oxide mineral, a tough and versatile synthetic abrasive. The 3M sandpaper can be used by hand or for machine sanding. It removes dust nibs, paint runs and refines sanding scratches in clear coat. It also conforms to surfaces for consistent finishes. Ensure that while you're working you have proper Clear Safety Eye Protection!