Mapping

Description

Areas of the surface with a differing texture or degree of gloss, surrounded by clearly defined boundary or contour lines.

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.