Answer
Sanding helps raised lap edges. Use 400 or 600 lightly, then repaint the section.
Why it happens
Some lap marks are thickness ridges that can be feathered; color or sheen mismatches usually need repainting.
Recommended grit
Use 400 or 600 to feather raised lap edges before repainting.
Wet or dry
Dry.
Success check
Raised edges are blended before repainting the full section.
What to do
- Let the paint dry fully.
- Check if the lap mark is raised or only a sheen/color difference.
- Feather raised edges with 400 or 600.
- Clean dust and repaint the section evenly.
Avoid: Do not sand aggressively if the issue is only color or sheen mismatch.