Mixing Compounds?

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Part A: Any definitive answer on swapping out some race dedicated pads on race day, and using crappy auto parts store pads on a the street (daily driver) without changing the rotors?

Part B: As a compromise, how long do the bobcats last on the street with an autocross every weekend or every other weekend? What about the AX6/bobcat combo?

Racing is mostly autocross or similar, maybe one, maybe two, road course days a year.