SAGGING
(Excessive flow, causing runs or sagging in paint film during application.
Ussually caused by applying to heavy a coat of paint or thinning the paint too
much).
Downward "drooping" movement of the paint film, patterns in paint film which
resemble curtains.
POSSIBLE CAUSE:
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Application of a heavy coat of paint.
Application over hard or glossy finish.
Application in excessively humid and/or cool conditions.
Application of over-thinned paint.
Airless spraying with the gun too close to the substrate.
Application over residual film.
SOLUTION:
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Glossy surface should be sanded before painting. If the paint is still wet,
immediately brush out or re-roll to redistribute the excess evenly. If the
paint has dried, sand, and reapply a new coat of top quality paint. Do not
thin the paint; avoid cool or humid conditions. Paint should be applied at
its recommended spread rate. Two coats of paint at the recommended
spread rate are better than one heavy coat.