Answer
Use 80 or 120 for old paint removal, then refine with 180 and 220 before repainting.
Why it happens
Old coating removal needs a grit that cuts the coating without unnecessary gouging.
Recommended grit
Use 80 or 120 for removal, then 180 and 220 for prep.
Wet or dry
Dry for removal unless the coating process requires another method.
Success check
Loose coating is removed and the surface is evenly prepared.
What to do
- Confirm the surface and coating are safe to sand.
- Start with 80 or 120 for old paint removal.
- Use lighter pressure near edges or soft material.
- Refine with 180 and 220 before repainting.
Avoid: Do not sand unknown hazardous coatings without proper safety controls.