Variations include: Abrasive material used; Type of backing; Format (sheet, belt or disk) for specific sanding machines. Grit is one of the most important variables. Perhaps more any other ...

one for 120-grit sandpaper and one for 180/220-grit sandpaper. Coat the foam block and the back of the sandpaper with spray adhesive. Carefully stick the sandpaper to the block to make sanding ...