Originally Posted by Hotrod_Lincoln
Tractor Supply alkyd enamel, with the isocyanate hardener added if it can still be found. Wear a full coverage disposable paper "shoot suit" and a charcoal filter respirator while spraying hardened enamel, as the cyanide compounds can be absorbed through the skin. The hardener makes that cheap enamel tough as woodpecker lips, and glossy.

Yep. That alkyd enamel isn’t that great UNLESS you spend the extra $20-$30 for hardener. Easily double-triple the lifespan, and looks glossier, too.