I am going to paint my calipers real soon and am wondering if anybody had any good tips on doing it. If at all possible, I do not want to take the calipers off. Thanks

 

degrease completely, mask it off real well. i would
recommend painting the hard to reach spots by brush first,
then spray at the end.

ive never done brake calipers, but i dont think there any
special procedure to do it than painting other parts.

someone can tell you if you need to sand the surface or not
before painting.

 

I brushed mine on and used a $4.95US can of Duplicolor. It took me about three-four hours to put 4-5 coats on all four wheels. Here's an old post of mine

The reason for brushing is that it takes forever to tape everything off. I used a Big Gulp cup with a paper towel over the lid to minimize over-spray(as I filled it up) for my paint cup. Worked great.
To clean the calipers I used a wire-brush drill-bit from Ace Hardware, and my cordless drill. It took about 10min per wheel. Make sure everythings nice and shiney before you start painting.

Another trick that I found is to use a sponge-brush to paint with. The sponge brush won't leave those "lines" that you get after painting with a regular brush. Also it's a good idea to have a couple extra paint brushes around...

One more suggestion: Jack the car up so that you can do two wheels at a time, that way when you're done with one side, the other will be dry and ready for another coat. Back and forth. I did 4 or 5 coats with Duplicolor 1200 degree paint ($4.95)and the calipers look almost rubberized.

 

Smart to use the high heat paint. That's the reason I'd leave it to the factory if at all.