Answer
Do not sand quartz countertops with coarse grit. For minor marks, test 2000 or 3000 wet in a hidden area first.
Why it happens
Engineered quartz has a finished surface that can lose sheen if sanded unevenly.
Recommended grit
Do not start with coarse grit. For minor test areas only, use 2000 or 3000 wet and polish afterward.
Wet or dry
Wet only for very fine test work.
Success check
The test area does not show a dull patch or uneven sheen.
What to do
- Clean the countertop first.
- Test any sanding in a hidden area.
- Use only very fine 2000 or 3000 grit for minor marks.
- Stop if the sheen becomes uneven.
Avoid: Do not use coarse sandpaper on a quartz countertop.