It might be possible to re-bed OEM (i.e., soft) brake pads to new rotors. If you're not a track driver or overly enthusiastic driver, it shouldn't matter all that much.

For future reference, it's pretty much a waste of time to resurface ITR rotors when you can buy perfectly good, new Brembo blanks cheaply. There's also places like Advance and Autozone...there's no point in spending a lot of money on items that are entirely expendable and for which items more money does not equal more service life.

Tell us, too, what kind of brake pads you're using, exactly. That would help us elmiinate the possibility that it's not friction material transfer that you're interpreting as rotor warp.