Answer
Do not sand visible ceramic glaze unless repair requires it. Test 1000 or finer wet first.
Why it happens
Glaze is a finished surface, and sanding can permanently change its sheen.
Recommended grit
Avoid sanding visible glaze. For tiny high spots, test 1000 or finer wet.
Wet or dry
Wet.
Success check
The test area remains even and does not show a dull patch.
What to do
- Clean the ceramic surface first.
- Avoid sanding visible glaze when possible.
- Test 1000 or finer wet on a hidden area.
- Stop if the sheen changes.
Avoid: Do not use coarse grit on ceramic glaze.