Sandpaper is an abrasive material used to smooth, shape, or finish surfaces by removing small amounts of material.
How it works: Paper or cloth backing coated with abrasive particles like aluminum oxide, silicon carbide, or garnet. You rub it against a surface and the grit scratches away roughness.
Key specs:
Grit number: Lower = coarser, removes material fast. Higher = finer, for finishing.
- 40-80: Heavy material removal, shaping
- 100-150: General sanding, prep for paint
- 180-220: Smoothing between coats
- 320+: Fine finishing, polishing
Backing types: Paper for hand sanding, cloth for power tools, foam for contours
Common forms: Sheets, discs, belts, sponges
Used on: Wood, metal, drywall, automotive paint, plastic. Pick grit and abrasive type based on material and job