You can never have too many tips when it comes to painting exterior surfaces. There are clear directions you can follow so that your metal paint job is a successful experience.
Start with the right preparations
Whether for wrought iron, aluminum or other metals, there are particular techniques for painting different surfaces. The process of painting metals such as railings, columns, roof vents and decorative pieces like outdoor lamps is similar to painting wood, which means the most important first step is preparation. Most metals are galvanized and need pre-treatment in order for paint to stick to surfaces.
How do you prime metal surfaces?
Whether you are painting ferrous metal or galvanized metal, the key to a successful job is preparing the surface for the prime coat. Ferrous metal needs a clean rust-free surface. Use a wire brush or a scuff pad to remove rust and wipe the surface with a damp cloth to remove all dust. Areas of sound rust or hard to reach areas can be treated with a solution such as Rust-Oleum™ 3575 Rust Reformer as long as all loose rust has been removed. Prime the metal immediately after preparation to avoid flash rust from forming on the surface.
New galvanized metal needs to be washed with a detergent solution to remove the oily residue inherent to new galvanized metal. If the galvanized is old and has white oxidation on it, this will need to be sanded, wire brushed or otherwise removed.
Use 1725 Acry-Shield 100% Acrylic Metal Primer or 5725 DTM Acrylic Metal Primer/Finish to prime either galvanized or ferrous metal. The 5725 DTM Acrylic Metal Primer is available in 100 White, 120 Red Oxide and 569 Black. You can achieve a satin finish with two coats.
For other metals, follow the same preparation guidelines and use 287 Kel-Bond Adhesion Plus Interior/Exterior Primer-Sealer.
100% Acrylic Satin Enamel
100% Acrylic White Metal Primer