Does enamel paint need primer?
The enamel paint should go on just fine, especially if it's an oil-based type, but a coat of primer might help the paint adhere better to slick surfaces. … A coat of primer never hurts, though, and will make the painted finish last longer.
What kind of paint works best on metal?
The best paint choices for metal surfaces are Oil or Enamel based Paints. Oil-based paints and metal surfaces go together like crab and dumpling. They are usually the best option for metal surfaces. Sure latex paints can work however, they are nothing compared to oil or enamel based paints for metal surface types.