I no longer purchase Rustoleum. It clogs at about the halfway point. I now spend a few more bucks and get Dupl-Color. It never clogs, and has a good spray pattern.
Like Hot, I have had extremely good luck with Scale Coat, but fear they have changed their formula. A jar will now go bad inside a year.
As to baking, I get really good chip-proof results by baking Scale Coat at 180 degrees for an hour.
Not an expert, but I do get good results. This one is scratch, with a copper boiler and frame machined from 1" square brass. Tender trucks in nickel silver from my father's foundry.
