Solvent popping

Cause

• Insufficient drying of primer filler in corners, edges, rebates and below decorative strips

• Solvent or air trapped in film, which then escapes leaving pop marks due to incorrect spraying viscosity, spraying pressure, flash-off times and drying times

• Incorrect choice of hardeners and thinners

• Film build too high

• Wrong spraying technique

Prevention

• Apply normal film thicknesses

• Check oven temperature regularly

• Follow recommendations on technical data sheets

Remedy

• After drying, repaint without sanding (within 24 hrs) or sand with Scotch brite ultrafine

• After drying and sanding, fill pinnholes with Polyester Spray Filler or remove damaged finish and repaint

• Sand, prime and repaint