How too

You could try this stuff here, I can't say that I've used this particular paint but I have used other duplicolor paints with good success.

http://www.partsamerica.com/ProductDetail.aspx?MfrCode=DPL&MfrPartNumber=BCP403&CategoryCode=3276

When I painted my last set of drums, I just took 'em off, wire-brushed the rust off, sprayed them with brake cleaner, and then sprayed them with VHT Brake Caliper Paint (gloss black ... actually works good for painting wheels, too). They've held up pretty darned good for the past couple of years. Caliper painting would be pretty much the same affair (brush, clean, spray), although I wouldn't advise disconnecting them from the brake hoses without plugging the banjo bolt hole, or you'll wind up spraying paint and crap into there that could mess with things.

I don't even think I needed to wait 30 minutes for the drums to dry enough for me to handle to throw 'em back on there.

I use this stuff right here http://www.g2usa.com/ . to me this product is one of the best on the market. I have used it on my explorer's which are year round vehicle's and have gone through winter and never lost the glossy finish or chipped. I have it on my contour's calipers for 6yrs now and they still look brand new. very easy to use, no spraying mix the hardner and brush on.