Answer
For terracotta before painting, clean first, smooth with 220, then refine with 320.
Why it happens
Terracotta is porous and can hold dust, so it needs cleaning and light smoothing before paint.
Recommended grit
Use 220 for rough spots, then 320 for smoother paint prep.
Wet or dry
Dry.
Success check
The surface is clean, dry, and evenly smoothed before paint.
What to do
- Brush off loose dust and dirt.
- Sand rough spots with 220 grit.
- Refine visible areas with 320.
- Wipe dust away before primer or paint.
Avoid: Do not paint over loose terracotta dust.