Answer
For peeling exterior wood trim, use 80 or 120 on loose edges, then 180 or 220 before primer.
Why it happens
Loose paint edges and weathered wood need leveling before primer or paint.
Recommended grit
Use 80 or 120 on loose peeling edges, then 180 or 220 for smoother repaint prep.
Wet or dry
Dry.
Success check
The trim is dry, smooth, and free of loose paint edges.
What to do
- Remove loose paint first.
- Sand peeling edges with 80 or 120.
- Refine with 180 or 220.
- Remove dust before exterior primer or paint.
Avoid: Do not paint over loose paint or damp wood.