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