Preparation is key to preparing metal for paint adhesion and long-lasting protection. Like any surface, metal will often contain contaminates, including existing paint, rust and oil. When painting, treat galvanized metal as non-ferrous. The ColorMaster Paint K05160202 from Krylon is a versatile spray paint for metal that’s also suitable for use on other surfaces such as wood, plastic, and many more. It’s durable enough to be a great choice for outdoor … White Low-Odor Oil-Based Interior Primer Spray, Sealer, and Stain Blocker Step #2: Prepare the Metal. Then sand the surface … The metal needs to be primed with anti-corrosive primer and painted with rust-proof paint for metal surfaces. Painting outdoor metal is not difficult, but you must use the right kind of paint made specifically for the outdoors. KILZ Original 13 oz. Step 1 Scrub away all rust, existing paint and dirt with a wire brush and steel wool. TCP Global Brand Professional New 2.5mm HVLP Spray Gun- Great for High Build Auto Paint Primer - Metal Flake application and any heavy bodied paint or Primer Material -with Air Regulator 4.4 out of 5 … These impurities can inhibit adhesion, therefore must be removed before painting.