Over hardening body filler causing a discoloration of the new finish.
Causes
- Original finish not sealed correctly
- Using too much hardener in the body filler
- Body filler not mixed thoroughly
Prevention
- Seal repair area with appropriate sealer
- Carefully measure the hardener when adding to the body filler
- Mix filler on the scale
Correcting
- Remove body filler and reapply over repair
- Isolate and sand the repair, seal and reapply topcoat
