have you looked in the how-to section there is a nice how-to overe there, he used a silver base coat then followed up with a blue clear and it looks like there anodized, very nice looking
I was thinking of going black or a dark grey, and making a small "mazdaspeed" stencil and marking the caliper in red or maybe yellow to match my speed. I was about to try but got to lazy because I figured it would flake of and look like s*** anyway.
There's my orange one with red.. I would go blue if I were to do it all again. The red seems a bit darker than I thought it would be and the orange would be hard to match unless you bought the exact color from paintscratch.com or something.