Paint that has lost its adhesion to a galvanized metal substrate.
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Deterioration of the paint film, resulting in excessive or rapid loss of luster of the top coat.
Surfactant leaching appears as tan or brown spots or areas, and can sometimes be glossy, soapy, or sticky.
Painting over red cedar, cypress, and redwood can lead to tannin staining.
Vinyl siding panels that have been repainted sometimes warp or buckle.
Painted hardboard can sometimes be discolored by "wax bleed," named for the wax that is used during manufacturing to make hardboard more water-resistant. The wax can migrate to the surface, where it can change the wood's appearance.
When uncured paint forms a skin, it can wrinkle, making the surface appear rough and crinkled paint.