I just finished overhauling the front and rear brakes on my recently acquired ZHP. I replaced the front calipers with ATE remanufactured ones and cleaned and repainted the rears. All new ATE bushings, guide pins, rubber brake lines, Zimmerman Sport rotors, BMW brake pads, parking brake rebuild both front and rear.
I also painted the calipers and carriers semi gloss black like the E46 M3.
Love the look.