just letting everybody know that if you have rusty rotors, the surface not in contact with the pads, all you have to do is use naval jelly. You can find it at any auto parts store. It's cheap and it works. Just spray some brake cleaner to remove residue when your done and follow up wth high temp paint from walmart.

...or if you have very uneven surface and want a budget skim. Put some old pads in backwards and go for a short spin.
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Tek