I have a question about these i know that the slotted sport rotors have a coating on it to prevent rust but do the Brembo OE replacement flat surface rotors have that same coating? my rotors have some ugly ass rust on it and i would like to replace em but don't really wanna dish out 300 bucks right now for the slotted, plus i already have a set of stock brake pads that would just get pulverized by the slotted. oh yeah and would the brembo oe replacements be better that the stock rotors?