Answer
For brake calipers before painting, clean first, use 180 or 220, then finish prep with 320.
Why it happens
Calipers need cleaning and scuffing before high-heat paint can bond to the metal or old coating.
Recommended grit
Use 180 or 220 for rough prep, then 320 for final paint prep.
Wet or dry
Dry.
Success check
The caliper is clean, dull, and free of loose material before paint.
What to do
- Clean brake dust and grease thoroughly.
- Remove loose rust or old coating with 180 or 220.
- Refine with 320.
- Clean again before paint.
Avoid: Do not paint over brake dust, grease, or loose rust.