Symptoms: Sagging or Running
This paint failure is easily identified as a dripping or drooping look to areas of the paint film.
Potential Causes:
- Application of a coat of paint that was too heavy or overloaded.
- Heavy handed paint application.
- Paint thinned too much at time of application.
- Paint was applied in poor environmental conditions such as too cool or when humidity was too high.
- Paint was applied without primer to a high gloss vertical surface preventing the paint substrate from having the "tooth" necessary for the finish coat to adhere.
- Painted surface was not clean or properly prepared at the time of application.
- If you catch the paint while still wet, use a brush or roller to redistribute the excessive paint evenly.
- If the paint is dried, sand the uneven area and lightly reapply paint.
- If paint was applied to a glossy surface, sand the glossy surface to dull it and create a "tooth" for the paint to adhere or apply a primer and repaint.
- Paint using two light coats instead of one very heavy coat.
- Do not overload the paint brush.
See tutorial How to Properly Use a Paint Brush.
