Putty Marks or Edge Shrinking

The repaired area by polyester putty or its edge showing in the topcoat.

Common Cause

1. (1) Insufficient sanding of putty.

2. Sanding paper of wrong size.

3. Paint absorption of putty is too serious because putty is not sealed by primer surfacer.

4. Putty layer too thick and before over-coated, not thoroughly drying.

5. Excessive shrinkage of putty; distortion after drying.

 Repair

(1) Sand the putty layer sufficiently and ensure smooth and even edge of putty.

(2) Use primer surfacer to seal the repaired area by putty.

(3) Use putty with small shrinkage.