i had my slotted rotors zinc plated black, everything on the surface of the rotor will rub off, but the black zinc will stay on the base and in the slots so you don't get that gross rust look.
good find, make sure you buy your brake rotors from a place with a lifetime warranty, so they wont warp or crack on you. That 40 dollars more you could have spent would be alot cheaper than a whole new set of rotors and possibly a whole new car if you couldn't break. Quality parts are key.
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