Poor Galvanized Metal Adhesion

What Causes It?

Poor galvanized metal adhesion can occur:

• When a surface has not been properly prepared.
  
• When a primer has not been applied before an oil-based paint is used.
• When baked-on enamel finishes or glossy surfaces have not been sanded before painting.

How to Solve It
First, use a wire brush to remove any rust on your metal surface. Then, apply a corrosion-resistant acrylic latex primer—one coat is usually sufficient.

With galvanized metal that is new or has been painted before and is rust-free, clean the surface to remove all fabricating oils.

Then, paint it with a top-quality acrylic latex paint without applying a primer.

With unpainted galvanized metal, however, always use a metal primer before you apply an oil-based or vinyl latex topcoat.

Note: Images provided by The Rohm & Hass Paint Quality Institute.