If you don’t have a wire brush, use a fine-grit sandpaper or sand block. Focus on stripping larger areas with your wire brush, as you can work on the nooks and crannies later when sanding the metal piece. [2] X Expert Source Patrick CoyePainting Specialist Expert Interview. 22 July 2020. Try using a cordless drill with a wire brush attachment to make the process that much quicker. Work in a ventilated area and wear gloves and a dust mask when working with paint and rust to protect yourself from harmful particles. [3] X Expert Source Patrick CoyePainting Specialist Expert Interview. 22 July 2020. Consider using a drop sheet to cover your work station to keep it clean. [4] X Expert Source Patrick CoyePainting Specialist Expert Interview. 22 July 2020.
Even if the surface looks fairly clean, don’t skip this step; otherwise, the paint may not stick to the metal properly. If you’re painting something made of galvanized steel, wash it down with white vinegar to break down leftover zinc from the galvanization process. This will help the paint adhere stick to the metal better. [6] X Research source
Always read the instructions on your primer, as there may be specific information on application or drying time. [9] X Research source If your metal is rusted, apply a zinc-chromate primer before the oil-based primer. This primer resists corrosion and helps protect metal from further rust. [10] X Research source Primer prepares a surface for paint by creating a smooth surface it can adhere to. [11] X Expert Source Patrick CoyePainting Specialist Expert Interview. 22 July 2020.
Oil-based paints work best on outdoor items that will experience lots of weathering. They’re pigmented and water-resistant but can crack and chip easily over time. Acrylic-based paints dry fast and their toxic-free formula makes them perfect for indoor use. They’re durable but aren’t water-resistant. Spray painting metal is another option that can give a smoother, cohesive finish. Read the instructions on your paint before painting, as there may be helpful information about application and drying time. [13] X Research source
Try to avoid moving your metal piece before it’s completely dried; otherwise, the paint may crack or peel prematurely. Consider applying a coat of clear sealant after the metal has dried for added protection. An extra seal can help the paint job last longer, chip less, and be waterproof.
