My understanding is that eventually the Cad wears away from the rotor surface. Stays nice looking on the rest of the rotor (ie. hat and non contact surfaces)
The rotors in the link are street rotors and there are several sites that offer Cadmium plated cross drilled or slotted rotors as a performance upgrade to OEM rotors. Definitely marketed as a performance rotor.
Guess I'll have to remove the nuclear reactor aftermarket kit I have on the CLK if I decide to go with the Cad rotors!
