Preparing Galvanized Sheet Metal For Painting

Here s how to paint galvanized metal.

Preparing galvanized sheet metal for painting.

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. Remove any handles or other attachments from the metal. If you have a kitchen then you probably already have this handy solution. Once the metal has been cleaned and is dry prime it using an exterior multipurpose latex primer or a latex primer that is made specifically for galvanized metal.

Common household products like comet mineral spirits and chlorine bleach can all be used to prepare galvanized steel for painting. Successfully painting hot dip galvanized steel also known as a duplex system does not have to be difficult or confusing. There are documents available that describe methods of preparing surfaces of new and weathered hot dip galvanized steel for painting. Rinse the metal with a weak solution of water and ammonia and allow it to dry.

Sand the entire. Proceed in small sections until you ve cleaned the entire surface. Wash the metal thoroughly with hot soapy water. A powerful degreaser will cut through dirt grime mold and other problematic residue without affecting the temperamental zinc coating.

Just like painting over bare steel proper surface preparation is crucial to ensuring effective adhesion. Before painting galvanized metal such as drip strips around eaves or roof flashing take the following steps so the paint will adhere properly and not peel. Additionally slightly different methods may be recommended according to the condition of the galvanized surface newly galvanized partially weathered galvanizing fully weathered galvanizing. Go over the metal with a wire brush to remove any oxidation.

White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent. The vinegar is a mild acid. Rinse the metal and let it dry completely for several hours. Preparing hdg for paint.

How to prepare zinc coated galvanized sheet metal for painting so that the primer and paint sticks. All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface.