Answer
For trim before painting, scuff with 220 and refine visible areas with 320.
Why it happens
Trim often has glossy old paint and detailed edges that need light scuffing, not aggressive removal.
Recommended grit
Use 220 for scuffing trim, then 320 for smoother finish prep.
Wet or dry
Dry.
Success check
The trim looks dull and smooth with no heavy scratch marks.
What to do
- Clean dust, wax, or grease from the trim.
- Scuff the surface with 220 grit.
- Use 320 on visible smooth areas.
- Remove dust from profiles before painting.
Avoid: Do not round over trim details with heavy sanding.