Prep Sheet Metal For Paint

Toward the end of our last installment minor metalwork was completed and a single wet coat of ppg s dp90lf 90 denotes black epoxy primer was applied to surgically clean bare steel.

Prep sheet metal for paint.

The acidity of the vinegar will react with the metal treating the surface to promote paint adhesion. Remove loose and peeling paint. Once done you can paint over rust. Clean new galvanized metal surfaces with a water based cleaner degreaser to remove any oil or and contaminants.

The acid in the vinegar will act to etch the metal and help the paint adhere. Prepping the surface 1. With the rust removed sand the entire surface to smooth out uneven areas and dull the surface so the primer and paint can adhere. X expert source james guth.

However badly rusted metal areas need more prep work and possibly a special primer. Don t forget to wear gloves eye protection and a respirator mask. Sanding and applying primer. 5 important steps preparing metal for paint clean the surface.

Start with 120 grit sandpaper and work to finer grade sandpapers ending with 320 grit. To prep and paint metal you ll need shop rags acetone scuffing pad self etching primer and your choice of spray paint. If the old paint is in poor condition you can remove it by hand wire brushing sanding. Allow the surface to dry.

All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface. Spray the surface with the solution then scrub it with a clean lint free. Once you ve finished cleaning the steel let it rest until all traces of the degreaser have. Scrub partially rusted metal areas with a wire brush to remove flakes and powdery surface rust then prime with a rust inhibitive primer.

For large flat surfaces use a sanding block to get even pressure. Once the metal has dried dampen a cloth with white vinegar and wipe the surface down. To prep metal for paint adhesion you must first clean it with soap and water remove light rust with a wire brush sand it with fine grain sandpaper and then in most cases prime. Start with a wire brush photo 1.