Answer
Use 180 or 220 lightly on veneer. Avoid coarse grit and heavy pressure.
Why it happens
Veneer is thin and can be sanded through quickly.
Recommended grit
Use 180 or 220 lightly for prep unless the finish instructions require another grit.
Wet or dry
Dry.
Success check
The veneer is evenly prepped without sanding through.
What to do
- Confirm the surface is veneer.
- Use light pressure.
- Sand with the grain.
- Stop as soon as the surface is evenly prepped.
Avoid: Do not use coarse grit aggressively on veneer.