I really don't think you can warp these rotors. I would recommend cleaning the rotors with a scotch brite pad with some brake cleaner then rubbing them with some really fine sand paper in an effort to rid the rotors of the deposits. That's what I did and it improved, but the issue wasn't completely eradicated until some aggressive driving with more aggressive pads (high speed bed in process and a 2 day track day have done the trick).
Hope this helps.
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