Open blisters on the finished surface
Causes
- Too much air flow over repair area
- Solvent trapped in the film during the curing process forming bubbles in the paint film
- High film builds
- Using too fast of a reducer and/or hardener for the spray conditions
- Bake temperature too high or IR lamp too close to the surface
Prevention
- Use appropriate reducer and/or hardener for spray booth conditions per product data sheets
- Apply recommended film builds per product data sheet
- Keep booth at recommended bake temperature and times
- Ensure proper spray booth air flow
Correcting
- Sand surface blisters smooths and refinish
- Severe cases must be sanded back to under coat and refinished
