How To Prep Galvanized Sheet Metal For Painting

Let the paint dry according to the directions.

How to prep galvanized sheet metal for painting.

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. Go over the metal with a wire brush to remove any oxidation. Inspect the surface carefully to make sure it s completely coated with the paint source.

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. Apply the metal paint which should be the same brand as the primer according to the product directions. Paints that are made for galvanized surfaces will require less prep work and will adhere better than other kinds of paint. The acid in the vinegar will act to etch the metal and help the paint adhere.

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. Do not use alkyd based paints or oil based primer. When painting galvanised steel you have to be aware that some primers and metal paints are not suitable.