I went the Walmart route and bought the High Temp. Rustoleum paint.
Moderately priced and you can find it everywhere. It works.
I did mine in Gloss Black. Not very original, I admit, but cheap and handy.
My UDS isn't a fashion plate, but it isn't gonna rust either.
Gloss Black has the added advantage of grease not really showing when
I hang my lid on the side of my barrel.