Stockae, the G-2 paint system is a 2 part epoxy, it's fairly easy to use and seems to be a pretty good product. I would suggest getting a better quality brush instead of using theres. Brake clean comes in a spray can which you need to use on all surfaces to be painted after you've removed all rust etc.

 

my recollection is that it is an aircraft high heat paint. very durable unless you race the car seriously; with lots and lots of heavy braking-
very easy to brush on- jack the car up, put it on jack stands- take all 4 wheels off- inspect for spring spacers and remove those that the dealer missed- spray the calipers with brake clean (it is a very powerful cleaner that removes all stuff from brakes) and we wire brushed them clean- then mix the epoxy paint and then paint calipers one at a time- go the the next one. by the time you get back to the first one it is dry and ready for another coat. enough paint for about 3 or 4 coats- but a couple will do nicely.
painted mine silver on my black car. the calipers are the color of the wheels- very clean; very classy...
good luck!!