I've never cured the paint, just let it dry.
I'm sure the paint was cured after I used my brakes and created heat.
Curing in a oven seems to be a good idea for brake drums that don't have wood spokes and small parts
Keep n mind that High Temp paint has fewer solids that will retain heat when in use. Since this type of paint has fewer solids, resist the temptation to add too many layers.
Where Are You From? Fremont, CA
Do You own a car built by Durant? 1931 Model 619 and 1929 model 60 Roadster
I had my drums powdercoated. The shop I used will blast them and coat them for almost as cheap as you can paint them. I just skimmed the lining(mainly to clean off the rust-you should not do much more than that, definitely not to solve any out of round issues). The powdercoating shop can easily mask the lining surface before they process them.