Sandpaper is a generic term for abrasive paper covered with a type of grit (no longer grains of sand) available in sheets, rolls, blocks, and disc attachments for power tools. 'Liquid sander' can also be painted over a surface to provide a key for the finish. Sandpaper is either fully covered with grit (closed coat) or partially covered (open coat) and grit size varies from coarse to fine. |