I used G2 caliper paint with good results on my S2000.
I also used a dremel to grind the surface smooth before starting.
The "engine paint" stuff from Autozone or whatever will NOT hold up to track days in my experience. Even the 1200 degree stuff will start flaking off. Maybe I didn't have a good seal on it last time, but so far the G2 epoxy stuff has held up suprisingly well. It's incredibly thick and plasticy stuff.
I'd go with black calipers with silver lettering on most color Elises. It would look more civilized and less ricey
