Answer
For stair treads, remove worn finish with 80 or 100, then prep with 120, 180, and 220.
Why it happens
Old finish and traffic wear need removal first, then a wood prep sequence before staining or coating.
Recommended grit
Use 80 or 100 for worn finish removal, then 120, 180, and 220 for prep.
Wet or dry
Dry.
Success check
The tread is smooth, even, and free of old finish ridges.
What to do
- Remove worn finish with 80 or 100 where needed.
- Level the surface with 120.
- Refine with 180 and 220.
- Vacuum and wipe dust before finish.
Avoid: Do not leave coarse grit scratches before staining or clear coating.