Answer
Use light pressure and 180 or 220 grit. Let the paper follow the curve; do not force a hard block across the edge.
Why it happens
A hard sanding block or heavy pressure can cut the high point of a rounded profile too quickly.
Recommended grit
Use 180 or 220 for shaping touch-up, then 320 for smoother prep.
Wet or dry
Dry for wood and general prep.
Success check
The edge stays rounded and matches the surrounding scratch pattern.
What to do
- Use light pressure on the rounded edge.
- Let the paper follow the curve instead of forcing it flat.
- Use 180 or 220 to refine the edge.
- Finish with 320 if the surrounding surface is also fine-prepped.
Avoid: Do not press a hard block across a rounded edge.