Edge Ringing (Mapping)

Enlarged sand scratches caused by swelling action of the topcoat solvents around the repair area

Cause

Filler or stopper incorrectly mixed, or not properly finished, primed or sealed.

Prevention

Mix filler or stopper correctly, apply and finish carefully and correctly.

Rectification

Rub down the affected area to a sound surface, refill or stop if necessary and prime or seal thoroughly.