[LordOfTheFlies]

Here is an e-mail from the guy I bought the rotors from. Not sure what to make of it.

Quote: Originally Posted by SportBrakes

from what i read on your posting, the rotors seem ok.
the scratching marks are normal. these rotors are zinc plated, and it
takes 100-200 mile for your pads to completely washed off the zinc.
during this first 100-200, you will feel the vibration and pulsation
when you brake. you will also see the black circular marks on the
braking surface area. but they will be wash off by your brake pads.

do not panic yet, let these rotors run for a few hundreds, let them
brake-in.
if the problem continues after 200 miles, please email me back.

thanks,
sportbrakes