I was told it was because the material of the pads versus the material of the rotors cause a little magnetism so when it sits, the pads stick to the rotors and they end up "warped".
My old rotors and brakes (OEM) did the same thing. I was hoping a different combination would help but not so much.
I didn't see why they couldn't be machined, if the shop goes slow but just curious if anyone else had experience with that.
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