As you're on the topic thought I'd share my caliper painting with you guys. (Please note, the sticking caliper problem mentioned in another thread was noticed while doing this job, and not a product of my shoddy workmanship....lol).
First off, I jacked up the car and removed the wheel. I always place the removed wheel under the car for added safety. I used a wire brush to clean the calipers. While there, I also had a brush around the lip of the arch. Wear safety goggles to do this, then you won't get a load of dried dust and mud in your eyes like I did!
Next off, with all the loose crap cleaned off, I used two brushes, a .5'' and 1'' brush, and carefully applied a generous coating of paint, making sure to use the smaller brush when working near the pad itself, so as not to contaminate it.
Each caliper took me around 45 mins, as I really tried to do the neatest job I could, even using a mirror to make sure I hadn't missed anywhere.
Overall I'm pleased with the outcome. I chose this colour because I wanted something subtle, although maybe I should have done red instead, as you have to really look to see them between the BBS cross-spokes. Anyhow, it looks better than rust brown