Step #1: Do a Magnet Test
The first step in painting galvanized metal is to find out whether the surface is, in fact, galvanized.
A simple magnet test is the answer:
- If the magnet doesn’t attract, then you’re working with galvanized metal.
- If the magnet does attract to the surface, it is NOT galvanized metal.
Step #2: Clean and Prep the Galvanized Metal
To clean and prep a galvanized metal surface for painting, you need to assess whether the surface is new or weathered.
Weathered galvanized metal features a white powdery residue on the surface of the metal. New galvanized metal does not.
If you’re working with weathered galvanized metal, use a degreaser to thoroughly clean the metal. You should also look for signs of traditional rust and remove it if necessary.
For new galvanized metal, wipe it down with white vinegar. Then use Corotech® Oil & Grease Emulsifier to thoroughly degrease and clean the surface. Remember to do a fresh water rinse after using a degreaser.
Helpful TipDo not sand galvanized metal, as the sanding process can damage the metal surface.
Step #4: Paint the Galvanized Metal
For painting galvanized metal, apply an even coat of Ultra Spec® HP D.T.M. Acrylic Enamel, which is available in low lustre, semi-gloss and gloss finishes and all 3,500+ Benjamin Moore colors. Use a paintbrush, roller or paint sprayer to apply the paint.
Step #5: Let Dry and Repeat
Allow your first coat of paint to dry completely before applying another coat. Consult the can label or the paint’s Technical Data Sheet for dry and cure times. Let your final coat of paint cure before returning the galvanized metal item to everyday use.