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Exterior Paint Problem Solver
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Poor Galvanized Metal Adhesion
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Paint that has lost its adhesion to a galvanized metal substrate.
Possible Cause:
Improper surface preparation, such as inadequate rust removal.
Failure to apply a primer before application of an oil-based or vinyl latex paint.
Failure to sand baked-on enamel finishes or glossy surfaces before painting.
Solution:
Remove any rust on the metal with a wire brush.
Apply a rust-inhibiting metal primer.
New or previously painted galvanized metal that is completely rust-free can be painted with quality latex house paint without applying a primer. However, a metal primer should always be applied to unpainted galvanized metal before applying an oil-based or vinyl latex top coat.
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