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.

How to prep galvanized sheet metal for painting.

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

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

Read the directions on the container of metal paint. Go over the metal with a wire brush to remove any oxidation. Apply the metal paint which should be the same brand as the primer according to the product directions. Common household products like comet mineral spirits and chlorine bleach can all be used to prepare galvanized steel for painting.