Answer
To scuff oil-based paint, clean first, then use 180 or 220. Use 320 for smoother visible areas.
Why it happens
Old oil-based paint can be glossy and slick, so it needs cleaning and scuff sanding before repainting.
Recommended grit
Use 180 or 220 for scuff sanding, then 320 if a smoother surface is needed.
Wet or dry
Dry.
Success check
The old paint is clean, dull, and evenly scuffed.
What to do
- Clean the painted surface first.
- Scuff glossy paint with 180 or 220.
- Smooth visible areas with 320 if needed.
- Remove dust before primer or paint.
Avoid: Do not repaint glossy oil-based paint without proper prep.