Our 3M Scuff Sanding Sponge is designed to make touching up curves, contours, corners and hard to reach areas easier. Designed for hand sanding tasks, use this 3-2/3 x 9-inch abrasive to hand sand primer and scuff the blend area prior to applying base coat and clear coat. After sanding primer, refine with 400 or 600 grit sandpaper, and then apply paint per manufacturer’s recommendations.3M Paint and Body Fine Scuff Pad is designed for scuffing base, primed, or painted surfaces for better adhesion of new coats of primer or paint. Non-woven nylon fiber pad will not rust, splinter or shred like steel wool, and features long-lasting, fast-cutting aluminum oxide abrasive. Flexible pad is great for hard-to-reach areas. The washable, reusable pad rinses clean.