Before getting into specifics, Leonard, let's clarify how sandpaper works. Sharp grains of various materials (grit) attached to the backing paper scratch, or â€œabrade
Proper sanding creates the best finishes, whether you're working with wood, metal or drywall. Learn how to choose the. Sandpaper Grit Numbers. Sheets of
Coarse grits (those under #100) damage a fine wood finish. Medium grits, such as #120 and #150, are useful for removing old finish or scratches. Fine grits, such as #220, are frequently used for a final light sanding just before applying stain to the wood.
Sandpaper works by scratching away defects with thousands of tiny abrasive. To prepare bare wood for paint, for instance, Norm starts with 80-grit paper, .