Answer
Remove loose paint, clean the surface, sand dull with 180 to 220, and remove dust before repainting.
Why it happens
The surface may have dust, gloss, loose coating, contamination, or improper coating prep.
Recommended grit
Use 180 to 220 for general prep and follow coating instructions.
Wet or dry
Dry for most repaint prep.
Success check
Only sound, clean, dull coating remains before repainting.
What to do
- Remove loose peeling paint.
- Clean contamination from the surface.
- Sand to a dull, even surface.
- Remove dust before repainting.
Avoid: Do not paint over loose coating or sanding dust.