Re: no success with lube on metal surfaces... Are the pads chamfered? I've seen quite a few come without the bevel and this seems to contribute to squeal. You can just cut the pad material with a rasp or a file. Also, did you bed in the pads to the rotor? Essential to transfer the pad material to the rotor. --bob '86 5ks avant '02 TTQR '06 GTI '07 Q7 4.2P