How To Spray Paint Galvanized Sheet Metal

For the most dependable results look for paints that are formulated specifically to bond to galvanized steel.

How to spray paint galvanized sheet metal.

Once the metal has dried dampen a cloth with white vinegar and wipe the surface down. In fact roughly 69 of steel is recycled in north america each year. The surface that has been painted. Galvanized steel is a great material to use for a variety of tools products and projects and it s environmentally friendly.

Avoid using alkyd based paints such as spray paint on galvanized steel. The enamels in alkyd paints can react with the slick zinc finish on a galvanized steel surface leading to poor adhesion and peeling. On older galvanized metal surfaces where the zinc coating has begun breaking down known as white rust use a wire brush or fine sandpaper to remove the chalky film before cleaning it. The painting process is actually very straightforward because the surface of galvanized steel is relatively smooth and consistent.

Possible cause new galvanized metal a product used to make corrugated sheets gutters and downspouts is usually smooth and is coated with either a layer of oil to prevent white rust or is passivated. Alkyd and oil based paints may seem to stick at first but the oily layer eventually sheds the paint. Paint that has lost its adhesion to a galvanized metal substrate e g. Galvanized metal is difficult to paint because it s coated with a layer of oil to prevent white rust.

When painting galvanized steel all paint systems used should be specifically formulated for use on galvanized steel and applied in accordance with the paint manufacturer s recommendations. 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.