Putty Patch or Substrate Scratches

During the paint drying process, paint finish loses gloss and the under layer defects like putty patches and substrate scratches could be seen easily.

Common Cause

1. Wrong size of sanding paper and poor sanding.

2. Substrate dry spray.

3. Insufficient flash-off time between layers.

4. Poor drying condition.

5. Primer is sanded when it is not thoroughly drying.

6. Uneven stirring of the primer.

7. Poor solubility of thinner.

 Repair

(1) For small defect, after thoroughly drying, fine sand, then polish.

(2) In serious cases, after thoroughly drying, fine sand, then re-spray.