Clear Powder Coat Over Bare Metal

I ve noticed that when we clear powder over bare metal it yellows over time.

Clear powder coat over bare metal.

If you simply clear coated or clear powdered a frame it would rust. Legs are made from new hot rolled steel so they have a layer of oil on them and maybe just one or two surface rust blotches. Even in a matter of weeks it would be present. You can t tell it when you clear over a color but you can when its bare.

I would like to clear coat bare metal table legs. Step 1 the first step to powder coat over an existing coating is to visually check the coating to make sure the underlying coating does not have bare patches issues with significant peeling off or rust break through step 2 if these issues are not present you should roughen the surface through sanding. For the longevity of a steel frame s lifespan it needs to be properly primed and painted. Don t forget to frame saver either.

Rust destroys steel and the only thing that keeps it from forming is a primer. It may have to due with the high humidity that we have here though. Clear coats come in all different types but acrylic thermosetting powder is the most commonly used type of powder for clear coats. Types of clear coat.

Preparing bare metal for clear coat october 25 2018.