Answer
For hinges, degrease first, scuff with 220 or 320, then use 400 for smoother prep.
Why it happens
Hinges often have oil, old finish, or slick metal that needs cleaning and light scuffing.
Recommended grit
Use 220 or 320 for scuffing hinges, then 400 for smoother paint prep.
Wet or dry
Dry.
Success check
The hinge is clean, dull, and ready for primer or paint.
What to do
- Remove grease or oil from the hinge.
- Scuff with 220 or 320 grit.
- Refine visible areas with 400.
- Clean dust before primer or paint.
Avoid: Do not paint over oily hinge surfaces.