Answer
To fix a paint tape edge, feather with 320, then refine with 400 or 600 before repainting.
Why it happens
The edge needs to be feathered gently so the next coat blends instead of showing a ridge.
Recommended grit
Use 320 to feather the edge, then 400 or 600 for finer repaint prep.
Wet or dry
Dry.
Success check
The paint edge feels smooth and blends into the surrounding surface.
What to do
- Let the paint dry fully.
- Feather the raised edge with 320.
- Refine with 400 or 600.
- Clean dust before repainting.
Avoid: Do not dig a groove along the tape line.