The orange is PPG 3116, single stage urethane on this one.
After it had cured for awhile I decided I wanted more gloss and a few more mils/little bit thicker appearance, so I
added a couple coats of some Acme Finish 1 FC720 clear. Really did the trick.
All catalyzed materials, sprayed with a gun etc, mostly because I want chemical resistance.
Rattle can paint can look really nice too, and as an experiment I tried the same clear coat over a cured rattle can product as a test.
Sort of using the rattle can stuff as a basecoat.
Really worked great and I think the hardened clear should be pretty resistant to chemicals and so on.
You can take rattle paint and (to a certain degree) bake it on, gently, by heating it with a propane torch.
This somewhat hardens the material and seems to toughen it. Nowhere near as much as an isocyanate hardened material
but an improvement over the fresh, sort of gummy/sticky rattle can stuff sometimes has for a long time until it air dries.