To continue the search engine assist, take a look at these brake drums we had powder coated:
Yes, we took a set of good brake drums, 
had them completely sand blasting all those years of dirt, oil infused goo, rust and whatever then had them powder coated. Cost was $75 per drum. After getting them back, a thorough wash was in order inside mainly but also outside because hey, you really don’t want any sand in the brake drum… right? 
after that we cleaned up the bearings and found one with a loose cage. Now packing the inner and outer bearings 
BTW, many have asked what grease to use in this application. We usr this 
I’ve only found it in gun tubes. There is good grease out there so lets not get into grease wars….. would be a nasty battle…. Packing the bearings, installing new inner seals we reinstalled these
really nice looking drums onto MoHo . 
Good deal, looks good While we’re in there, Arthur will dig out that old sealant along the bottom of the wheel liner where the 3/4″ plywood floor edge is visible. We reseal that crack (where water gets in on your floor when it rains and you’re driving) The Arthur 
I’d worry the heat of powder coating might warp something – ho hot does it get relative to heavy braking?
Not more than 400 degrees.
I had my wheels powder coated for $40 each.
Expensive over kill for a brake drum IMHO. What’s wrong with High Temp Rust Oleum?
Along with the powder coating they totally sandblasted the drums. Heck, that’s worth something. True paint would suffice but hey, this coach is going to be something really special…… man those things look nice….