Painting Galvanized Metal Siding

Do not use alkyd based paints or oil based primer.

Painting galvanized metal siding.

Pre finished metal siding is siding that has already been painted and while this coating lasts a long time it will eventually erode away. When this happens the metal is exposed to the elements and will start to eventually rust. 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. Large cans may be the most cost effective option when painting large linear metal objects such as fences and backsplashes but spray paints e g rust oleum hammered metal finish spray 8 74.

Galvanized steel also requires special surface treatments before painting. Painting galvanized steel is a simple enough job but it does require some specific tools and materials. Galvanized steel is less prone to rust since it has a special zinc coating which needs to be thoroughly cleaned and roughened so that the primer paint will adhere to it properly. This in turn will help you to paint it easily.

Steel rusts very quickly and this is the one common disadvantage of having steel siding. Go over the metal with a wire brush to remove any oxidation. Inspect every crevice of the siding for the rust. The surface that has been painted.

Alkyd and oil based paints may seem to stick at first but the oily layer eventually sheds the paint. Apply the sherwin williams paint and primer to a galvanized roof with a paintbrush or a roller specifically designed for corrugated metal. If crawling around on a metal roof in the hot sun does. It also helps to peel away the previous paint on the steel siding leaving it neat and clean.

Galvanized metal is difficult to paint because it s coated with a layer of oil to prevent white rust. Spray rust converter on each section you find. Paint that has lost its adhesion to a galvanized metal substrate e g. Common household products like comet mineral spirits and chlorine bleach can all be used to prepare galvanized steel for painting.

The first sign that this is beginning to happen is a loss of the glossy look that new siding has. Paints that are made for galvanized surfaces will require less prep work and will adhere better than other kinds of paint. Some people use acrylic latex paint which is not designed specifically for galvanized metal so you will want to prime the surface before painting. Step 2 tackle rust.