Answer
For stair treads before stain, use 80 or 100 on rough wear, then 120, 150, and 180.
Why it happens
Stair treads need enough refinement for appearance while keeping the surface ready for stain.
Recommended grit
Use 80 or 100 for rough wear, then 120, 150, and 180 before stain.
Wet or dry
Dry.
Success check
The tread is smooth and accepts stain evenly.
What to do
- Clean the stair tread.
- Use 80 or 100 only on worn rough areas.
- Refine with 120 and 150.
- Finish with 180 before stain.
Avoid: Do not leave cross-grain scratches on visible stair treads.