Answer
For garage cabinets, degrease first, scuff with 180 or 220, then use 320 after primer if needed.
Why it happens
Utility cabinets need cleaning first, then scuff sanding so primer or paint can bond.
Recommended grit
Use 180 or 220 for scuffing, then 320 after primer if needed.
Wet or dry
Dry.
Success check
The cabinet surface is clean, dull, and ready for primer.
What to do
- Degrease the cabinet surface.
- Scuff with 180 or 220.
- Remove dust before primer.
- Use 320 lightly after primer if the surface feels rough.
Avoid: Do not paint over grease or shop dust.