Painting metal involves many of the same skills, tools and paints used with wood. The keys are properly preparing the surface and using the right primers and paints. Here are a few tips on painting outdoor metals:
Thoroughly power wash it using a TSP additive, or TSP substitute. Rinse and let dry for two or three days. There’s no need to prime if original paint is firmly adhered. Paint using 100-percent acrylic latex. Downspouts and gutters. Apply metal primer. Then paint the same way as you would siding. New galvanized metals. Roof flashings or vents should weather for six months.
- Apply special galvanized metal primer, then two coats of latex paint.
- Apply a rust solver to intricate areas. Let the areas sit for 30 minutes, then spray off with a garden hose.
- Remove flaking paint using a wire brush or wire brush accessory in a drill. Wear eye and breathing protection.
- Coat entire railing with a primer. A direct-to-rust primer bonds with any remaining rust, solidifies it and prevents it from spreading. Spray or brush on the final topcoat.
- Metal is strong, but not indestructible. If you have a dent in thin metal and can reach the opposite side, try pushing it out using the heel of your hand. If the back ‘side is inaccessible, drill a small hole in the dented area, insert a screw, grasp the head with locking pliers and pull straight out. If the dent doesn’t come out, tap around the raised border of the dent with a hammer to release the pres-sure, and then pull again. For repairing large dents, follow these illustrations:
- Prepare epoxy tiller from a fiberglass repair kit. Use a putty knife to fill dent with epoxy, pressing it into holes, mounding it slightly above surface and overlapping the edges of the undented area.
- To remove a small dent, push it out by hand from the opposite side. If that fails, hold dented area against a bag filled with sand, and tap it gently with a mallet until the area smooths out.
- To repair a dent in thick metal, clean and sand the metal, and then drill a series of small holes to help anchor some filler.
- Let filler cure completely. Sand even with surrounding surface. Clean and paint the area.