How To Paint Galvanized Steel Sheet

The problem with painting galvanised metal is that the surface when new is very shiny and smooth making it difficult for paint to stick to the surface.

How to paint galvanized steel sheet.

Rinse the metal with a weak solution of water and ammonia and allow it to dry. Once the metal has dried dampen a cloth with white vinegar and wipe the surface down. The acid in the vinegar will act to etch the metal and help the paint adhere. Let the primer dry completely which should take anywhere from 2 6 hours so your paint will stick properly.

To paint galvanized steel start by applying a latex based primer evenly across the surface to stop the paint from soaking into it. T wash etch primers sweep blasting and weathering. When painting galvanised steel you have to be aware that some primers and metal paints are not suitable. Wash the metal thoroughly with hot soapy water.

The secret to painting galvanized steel is white vinegar. There are four recognised methods of surface pre treatment that produce a sound substrate for a paint coating. Preparation of galvanized steel before painting. Selecting the correct paint for galvanised metal.

On older galvanized metal surfaces where the zinc coating has begun breaking down known as white rust use a wire brush or fine sandpaper to remove the chalky film before cleaning it. Rinse with water and let completely dry. All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface. If you have a kitchen then you probably already have this handy solution.

You can use a dedicated galvanised metal paint or yo. The primer provides a corrosion barrier just as the zinc oxide did. Rinse the metal and let it dry completely for several hours. Clean the surface with warm or hot soapy water.

White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent. Polish the metal with ammonia and sand any rough areas. Use a primer designed for use on metals. Allow the primer to dry completely.

Apply a second coat. It also has surface contaminants oils greases residues etc left on the surface from the manufacturing process that interfere with the adhesion of paints. Apply a rust proof primer to the galvanized metal with a paint brush.