Yes, Actually the "G2 caliper paint" that I used is "brush on application" - the entire set comes with brake caliper cleaner, the paint, the reactor (which you are sopposed to mix with the paint), and a brush. G2 is a German company and they claim that their paint has the highest heat resistant rating in the industry. Over 950 degrees!
Another brush on paint is the "Foliatec" (not sure of the spelling), and it is a similiar package like the G2.
You could get the G2 paint at:
streetbeatcustoms
Hope it helps.