3M Pro-Pak Wetordry Between Finish Coats Sanding Sheets, 400A-Grit, 9-Inch by 11-Inch

Sharp, synthetic silicon carbide cuts fast and smooth for wet or dry sanding between coats of varnish, paint or other finishes, sanding metal for repainting or prior primer coat, and wet finishing of plastic/fiberglass and top coats. Use with water to reduce clogging and extend abrasive life. Packaging strong enough to use as storage container for unused sheets.