Painting Galvanised Sheet Metal

Prime the surface with a primer made for metal.

Painting galvanised sheet metal.

Here s how to paint galvanized metal. New galvanized metal a product used to make corrugated sheets gutters and downspouts is usually smooth and is coated with either a layer of oil to prevent white rust or is passivated. T wash etch primers sweep blasting and weathering. The enamels in alkyd paints can react with the slick zinc finish on a galvanized steel surface leading to poor adhesion and peeling.

Avoid using alkyd based paints such as spray paint on galvanized steel. How to paint galvanized metal. The following is a quick introduction for the process. Wipe the galvanized surface down with white vinegar.

White vinegar is both effective and non toxic so it is much safer to use than your average industrial solvent. The secret to painting galvanized steel is white vinegar. Galvanized steel is coated with a thin layer of oil and passivator that protects it from water and weather damage. That s great for preventing rust but it also prevents solid paint adhesion.

For the most dependable results look for paints that are formulated specifically to bond to galvanized steel. Rinse the metal and let it dry completely for several hours. Go over the metal with a wire brush to remove any oxidation. You first are advised to prepare the surface of the item to be painted so that the paint for galvanized metal stands its best chance of looking good for several years.

Painting galvanised metal is very easy as long as the right steps are carried out. Bituminous latex acrylic and vinyl paints tend to adhere well to galvanized metals. All you have to do is simply apply the vinegar to a clean rag and then wipe down the galvanized surface. Preparation of galvanized steel before painting.

Paint applied over this oily surface or clear passivator will peel quickly. Metals depot stocks many sizes in precut sizes full mill sizes or we can hot dip virtually any. The vinegar is a mild acid which acts to etch the galvanized coating so the paint will stick. There are four recognised methods of surface pre treatment that produce a sound substrate for a paint coating.

Remove any handles or other attachments from the metal. If you have a kitchen then you probably already have this handy solution.