Answer
Fisheyes mean contamination is still present. Clean first, then sand with 220, 320, or 400 before repainting.
Why it happens
Oil, wax, silicone, or cleaner residue is still on the surface after sanding.
Recommended grit
Clean contamination first, then prep with 220, 320, or 400 based on the coating stage.
Wet or dry
Dry for most prep after cleaning.
Success check
The cleaned and sanded surface accepts coating evenly.
What to do
- Stop painting work.
- Remove wax, oil, silicone, or cleaner residue with the coating system's recommended cleaner.
- Sand only after the surface is clean and dry.
- Remove dust before repainting.
Avoid: Do not try to sand contamination deeper into the surface.