Preparing Sheet Metal For Painting

However badly rusted metal areas need more prep work and possibly a special primer.

Preparing sheet metal for painting.

Start with 120 grit sandpaper and work to finer grade sandpapers ending with 320 grit. Prime the surface with a primer made for metal. Things you ll need chemical degreaser distilled white vinegar lint free cloth high grit sandpaper or wire brush exterior latex primer exterior latex paint paintbrush or roller rubber gloves. Spray the sheet metal with white vinegar and wipe it down with a clean rag.

Introduce your secret weapon the secret to painting galvanized steel is white vinegar. Some metals are pre coated with an oil that is designed to. If the old paint is in poor condition you can remove it by hand wire brushing sanding. Start with a wire brush photo 1.

The vinegar is a mild acid which acts to etch the galvanized coating so the paint will stick. Sanding and applying primer. Go over the metal with a wire brush to remove any oxidation. Once done you can paint over rust.

Scrub partially rusted metal areas with a wire brush to remove flakes and powdery surface rust then prime with a rust inhibitive primer. No matter what the material it s hard to apply a proper coat of paint if you re brushing over bits and particles. If you need to paint inside choose a well ventilated area and consider using a respirator. Preferably set up your painting area outside.

Wipe the galvanized surface down with white vinegar. Place the object you re painting on a drop cloth. The goal is to remove any dust dirt or other particulate buildup that could affect the texture of the metal surface. To properly prepare new metal surfaces use mineral spirits to remove grease and apply a.

Spray the metal with compressed air. Paint will not adhere to dirty oily surfaces. Remove loose and peeling paint. The vinegar s acidity will further abrade.

If you haven t already spread out a drop cloth or a large plastic sheet. For large flat surfaces use a sanding block to get even pressure. With the rust removed sand the entire surface to smooth out uneven areas and dull the surface so the primer and paint can adhere.