well i got RB74 front pads, and they squealed when no brake was applied, when applied it is quite normal for them to squeak. So i got my discs machined cos they were warped and had a lip, wow it worked! no more squeal. BUT i was at the track today, and after the day they now squeak again and very annoying! The discs i think are too thin to be machined again, wat do you reccommend ? new discs ? or could it be some thing else like dirt stuck between pad and rotor? please help me