How To Prep Galvanized Sheet Metal For Painting

Some people use acrylic latex paint which is not designed specifically for galvanized metal so you will want to prime the surface before painting.

How to prep galvanized sheet metal for painting.

Paints that are made for galvanized surfaces will require less prep work and will adhere better than other kinds of paint. If you re attempting to paint siding panels roof flashing or other materials that have seen exposure to the elements a thorough cleaning is necessary to eliminate any organic contaminants from the outer surface. Go over the metal with a wire brush to remove any oxidation. 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.

Do not use alkyd based paints or oil based primer. Once the metal has dried dampen a cloth with white vinegar and wipe the surface down. You can use a dedicated galvanised metal paint or yo. 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.

Read the directions on the container of metal paint. Inspect the surface carefully to make sure it s completely coated with the paint source. The acid in the vinegar will act to etch the metal and help the paint adhere. Let the paint dry according to the directions.