Answer
For plastic outdoor chairs, clean first, scuff with 320 or 400, then refine with 600.
Why it happens
Outdoor plastic needs cleaning and light scuffing before primer or paint.
Recommended grit
Use 320 or 400 for scuffing, then 600 for smoother paint prep.
Wet or dry
Dry.
Success check
The plastic is clean, dull, and evenly scuffed.
What to do
- Wash and dry the plastic chair.
- Scuff lightly with 320 or 400.
- Use 600 on smoother visible areas.
- Remove dust before plastic primer or paint.
Avoid: Do not use coarse grit that gouges plastic furniture.