Moisture blisters

Cause

• Residue of sanding water in corners, edges, rebates and below decorative strips

• Contaminated air supply

• Insufficient isolation of polyesters

• Air humidity too high

• Waterborne products not completely flashed off/cured

• Dried salt residues

Prevention

• Always remove exterior trim

• Blow and dry carefully with air

• Check air supply equipment regularly

• Ensure correct flash off/curing of waterborne products

• Before processing and spraying, clean according to instructions

Remedy

• Remove all contaminated finish and repaint