Be aware that alkyd enamel is stone age technology. It takes around 30 days for the binder to fully oxidize and let the paint achieve full hardness. Adding an isocyanate hardener speeds up that process somewhat, but be aware of the health risks when spraying material containing cyanide compounds- - - -NO exposed skin, and wear a very good quality "Darth Vader" respirator with the proper filter canisters. A simple dust mask isn't enough protection!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!