3M™ General Purpose Sandpaper comes in a variety of minerals and a wide grit range. This sandpaper is ideal for painted surfaces, bare wood, and metal. These sheets can be cut to fit hand sanding, on a sanding block, or a power tool sander.3M General Purpose Sandpaper can be used for general filing purposes. Made with aluminum oxide mineral, this tool can and paint, wood, metal and other materials as well.