Hey guys, I have this horrible squeal from the front left brake. I took it off today and noticed some lines in the pad and rotor. I sanded the pads down with some 150 grit paper. I sanded just enough to make the pads rough again (Pads and rotors are new about a month ago and just started this bad noise). I put some anti squeal on the backs of the outer pad. Bolted everything back up and drove. About 2 miles down the road, it started to squeal. The noise starts as soon as I touch the brake and stays constant and loud till I come to a stop. The noise sounds like metal on metal but, I don't see anything out of the ordinary. The rotor has a few shiny lines on the rotor but I don't know if thats the problem. Do I need to sand this new rotor down? I probobly have 600 miles on it.
Any input would be helpful.
Thanks
