Paint With Confidence
Exterior Common Issues & Solutions
Text & image courtesy of the Rohm & Haas Paint Quality Institute
Poor Galvanized Metal Adhesion
Paint that has lost its adhesion to a galvanized metal substrate.
Possible Cause
- Improper surface preparation, such as inadequate removal of rust or oils.
- 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
Any rust on the metal should be removed with a wire brush; then, an acrylic latex corrosion-resistant primer should be applied (one coat is usually sufficient). Prime bare galvanized with a corrosive-inhibitive latex primer, and apply a top quality latex paint.
