How To Paint New Galvanized Sheet Metal

How to prepare zinc coated galvanized sheet metal for painting so that the primer and paint sticks.

How to paint new galvanized sheet metal.

Galvanized metal is not easy to paint because of the oil based rust preventing coating. In fact roughly 69 of steel is recycled in north america each year. Clean new galvanized metal surfaces with a water based cleaner degreaser to remove any oil or and contaminants. How to paint galvanized metal.

Alkyd and oil based paints may seem to stick at first but the oily layer eventually sheds the paint. Galvanized steel is a great material to use for a variety of tools products and projects and it s environmentally friendly. Rinse with water and let completely dry. Here are directions on painting galvanized metal.

The choices of paint for galvanized metal will depend upon both the application and service environment. To paint galvanized steel start by applying a latex based primer evenly across the surface to stop the paint from soaking into it. Polish the metal with ammonia and sand any rough areas. Go over the metal with a wire brush to remove any oxidation.

The problem with painting galvanised metal is that the surface when new is very shiny and smooth making it difficult for paint to stick to the surface. The acid in the vinegar will act to etch the metal and help the paint adhere. It also has surface contaminants oils greases residues etc left on the surface from the manufacturing process that interfere with the adhesion of paints. Clean the surface with warm or hot soapy water.

When painting galvanised steel you have to be aware that some primers and metal paints are not suitable. Let the primer dry completely which should take anywhere from 2 6 hours so your paint will stick properly. Before painting galvanized metal such as drip strips around eaves or roof flashing take the following steps so the paint will adhere properly and not peel. Once the metal has dried dampen a cloth with white vinegar and wipe the surface down.

The painting process is actually very straightforward because the surface of galvanized steel is relatively smooth and consistent.