i am gather supplys to paint my rusty calipers this weekend i got a 1999 audi A6 all black with blacked out windows what color you guys think? black , red or yellow?

I did the calipers on my A4 in black at first. After about a week of driving the dust buried them and they didn't even look like they'd been painted. I'd go with red honestly - they look good that way. Yellow (to me) screams "Honda" unless you have a yellow car. Can't go wrong with red though:

http://pic90.picturetrail.com/VOL2238/10764254/19178207/312042192.jpg

http://pic90.picturetrail.com/VOL2238/10764254/19178207/312638403.jpg

yah thats looks really good... umm when you painted that did you a gloss type finish or is that just caliper paint ???

Sorry about the delay in the reply - was on vacation. I cleaned the calipers with brake cleaner, then painted them using Duplicolor Engine Enamel (500 degree) from AutoZone. I sprayed the paint into the cap, and used a 1" foam brush to brush it on. I used Ford Red (only time I'll ever use anything with the Ford name lol), and did four coats on each caliper. No clearcoat on it yet - that'll be soon though. I wanted to give it plenty of time to cure before clearing them.