There are generally two types of metal paint primers that you can use on your shed red oxide zinc chromate and zinc chromate.
Best paint for sheet metal.
Spray in a quick smooth and even pattern until the surface is covered.
Large cans may be the most cost effective option when painting large linear metal objects such as fences and backsplashes but spray paints e g rust oleum hammered metal finish spray 8 74 for.
Elbow grease will do the trick for lightly rusted metal but tougher jobs may require a power sander or chemicals.
Hold the spray paint can 12 to 24 inches 30 4 to 60 9 cm from the surface.
The red oxide zinc chromate is best used for steel ironworks and galvanized steel.
For best results keep the can parallel to the sheet metal surface and spray in a back and forth motion over the surface.
Paint can t bond to rust so you ll need to start by restoring the surface.
Patrickaugust 17 2015 at 11 45 pm.
Use the zinc chromate if your shed is made from aluminum or any light alloy.
Topcoat with two coats of a high quality exterior latex paint.
Getting a rusty metal object ready for painting takes a bit of work but it s totally doable.
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.
Bituminous latex acrylic and vinyl paints tend to adhere well to galvanized metals.
Oil based paints take much longer to dry and they need a high quality paintbrush that doesn t shed during application.