Answer
For melamine before painting, clean first, then scuff with 220 or 320 before bonding primer.
Why it happens
Melamine has a hard, smooth surface that needs cleaning and light abrasion before primer.
Recommended grit
Use 220 or 320 to scuff the surface before bonding primer.
Wet or dry
Dry.
Success check
The melamine is clean, dull, and evenly scuffed before primer.
What to do
- Clean grease and residue first.
- Scuff the surface with 220 or 320.
- Remove dust completely.
- Apply a primer made for slick surfaces.
Avoid: Do not paint glossy melamine without cleaning and scuff sanding.