I've been painting chassis plates and end bells with Rust-oleum Hammered, which takes forever to harden so I use a little trick that should work well with any similar gloss enamel. Note that I specifically recommend against doing this with a choke or transformer or anything else with circuitry in it. This is strictly for metal parts.
After spraying I give the part 24-48 hours to dry then I place it in our kitchen oven set at 180F and leave it there to bake for 30-45 minutes. After which I give it another 24 hours before using. This does two things. It greatly speeds up the curing and making it hard enough for assembly without fear of marking it up soft paint, a huge benefit because without this step I have had to wait 2-3 weeks for a thick Hammered paint coat to harden sufficiently. Secondly, it really enhances the gloss. It gives it much higher gloss than as-sprayed.
After using (abusing?) the oven this way I run a self-clean cycle on it to blast out the fumes that had off-gassed from the paint. Oh, by the way, I haven't shared with my better half that I have abused our oven in this manner, and I have made sure she would not be home until several hours after completing the paint bake/oven clean cycle to ensure the kitchen no longer smelled of paint fumes.
