High temp engine paint, hammerite or caliper paint works. Heres what mine looked like after 50k miles of dirt on the caliper paint


Not too bad considering. And before you ask those are Tarox 20 groove disks with Kevlar pads

Mad Mole
Visit Mad Moles Mondeo Madness
2L Zetec, Cams, Stage 2 head, Valve work, Powerflow, Unichip, AEM Ram, K&N, Ecotek, 75mm Lower etc.
192 BHP, Faster than a speeding Duratec!