Answer
To paint over powder coat, clean first, then scuff evenly with 320 or 400 before primer or paint.
Why it happens
Powder coat is hard and slick, so it needs cleaning and an even scuff before recoating.
Recommended grit
Use 320 or 400 to scuff powder coat before primer or paint.
Wet or dry
Dry for scuff prep; wet can be used for finer finishing.
Success check
The powder coat is clean, dull, and evenly scuffed.
What to do
- Clean the powder-coated surface.
- Scuff evenly with 320 or 400.
- Remove all sanding dust.
- Apply primer or paint according to the coating instructions.
Avoid: Do not paint over glossy unscuffed powder coat.