• Incorrect spraying pressure or viscosity, spraying technique or application temperature
• Unsuitable combination of solvents or low quality solvents
• Insufficient sanding of substrate
• Incorrect spray gun set up
• Excessive temperature
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• Follow application recommendations from technical data sheets
• Prepare and sand substrate correctly
• Use recommended gun set up
• Always use recommended thinners
• Avoid application at very high temperatures
• Sand and repaint
• Sand and polish