3M Sandpaper comes in a variety of minerals and a wide grit range. Ideal for painted surfaces, bare wood, and metal. Sheets can be cut to fit hand sanding, on a sanding block, or a power tool sander.3M General Purpose Sandpaper comes in a variety of minerals and a wide grit range. Ideal for painted surfaces, bare wood, and metal. Sheets can be cut to fit hand sanding, on a sanding block, or a power tool sander.