It's not likely your problem, but thought I'd mention it anyway—if the scraping only happens in turns, check that there's more than 1/8" between the rotor and the backing plate. It doesn't have to be actually touching the rotor when static for it to scrape. If there isn't, you can bend some more clearance in with a screwdriver.
Don't know how you normally are with brakes, but I drive hard (or used to) and found cryogenically treated rotors to be worth every penny in terms of longevity. For normal drivers, it's probably unnecessary.
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