Poor Galvanized Metal Adhesion Exterior Paint Solution

Poor Galvanized Metal Adhesion: Paint that has lost its adhesion to a galvanized metal substrate.

Possible Causes:

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.


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). New or previously painted galvanized metal that is completely rust-free can be painted with a top quality acrylic latex 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.

How To Applying Primer onto a Ceiling

Brush (Cutting In)

1. Using a stir stick, thoroughly stir the primer.

2. Load a 2-3″ wide brush by dipping 1/3 of the bristle length into the primer.

3. Remove excess primer from the brush by tapping the bristles against the inside of the bucket.

4. Starting in the top corner of the ceiling, cut in a 3-4″ wide area around the perimeter of the ceiling.

5. Brush primer from the non-primed area to the previously applied areas.

6. Reload the brush as necessary to maintain a wet edge, approximately every 4-6″.

7. Repeat steps until all ceiling edges are complete.


1. Pour the primer into a paint tray or a 5-gallon bucket.

2. Place an appropriate nap roller onto a roller frame.

3. Dip roller cover completely into primer covering the entire nap area.

4. Remove excess primer from the roller cover by rolling onto the ribbed section of the paint tray or bucket grid.

5. Starting in the corner of the ceiling, place the loaded roller approximately 3-4″ away from the cut in area.

6. Working in a 3′ X 3′ area, roll a “W” onto the ceiling. Roll into the cut in area.

7. Continue rolling up to the edge of the cut in area, filling in the “W”.

8. Reload as necessary.

9. Continue applying, starting with the “W” technique 3-4″ away from the last section applied. Work from corner to corner, being careful to back roll the width of the roller into the last section applied.

10. Continue until the ceiling is completely covered.