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Exterior Paint Problem Solver

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Poor Galvanized Metal Adhesion

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.

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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