Answer
Yes. A polished surface can be too smooth for paint. Use 180 to 320 for most paint prep unless the coating says otherwise.
Why it happens
Paint adhesion can suffer when the surface is polished instead of sanded to a clean dull profile.
Recommended grit
Use 180 to 320 for most paint prep unless the coating maker specifies another grit.
Wet or dry
Dry for most prep unless coating instructions say otherwise.
Success check
The surface is dull, clean, and matches coating prep instructions.
What to do
- Check the paint or primer instructions.
- Avoid polishing the surface before paint.
- Sand to a clean, even dull surface with 180, 220, or 320.
- Remove dust before coating.
Avoid: Do not use ultra-fine polishing grits when the coating needs tooth.