Paint was applied to a surface contaminated with silicone, wax, grease, oil, etc.

Dust in the air from polishing compound, wax, etc. adhered to the wet paint surface.

Water or oil contamination in the air supply lines.

Overspray from an incompatible paint type adhered to the paint surface.

Check and service the compressed air supply and lines thoroughly.

Sand the old paint film only after cleaning the area with degreaser such as pre-solvent or equivalent material.

Thoroughly remove all sanding dust.

Do not reuse shop cloths or tack rags.

Wipe the area with pre-solvent and/or a tack cloth before painting.

If the fisheye is shallow, level the paint film by spraying dry paint mist.

After drying, recondition the area by wet sanding and repainting.

Use a commercially available “fish-eye eliminator”, but test it before application.