Flash-off times before baking or infrared drying too long
Distance too small for infrared drying, which leads to excessive drying temperatures Insufficient flash-off intervals between the individual coats in wet-on-wet processes
Prevention
Keep to the film builds as recommended
Use hardener and thinner appropriate to the ambient temperature
Respect the prescribed flash-off times between coats
When you use infrared drying, respect the recommended distances and intensity levels
Respect the recommended film thickness and flash-off periods between coats
How to repair
Sand the paint film back to a sound substrate
Repaint the area sanded down using suitable undercoat and finishing materials