Hi, I got new drilled/slotted rotors and PBR Utlimates on my car like three weeks ago and eveything was fine until I realized the mechanic messed up the E-brake, so I went back to him and he took care of that, but now a new problem devolped in the rear passenger side where most of the time when I apply the brakes slightly, a metal on metal sound occurs. (a dragging sound)

It only occurs when I tap the brakes slightly...I also can feel it in the brake pedal. I took it back to them 4 times and nothing appears to be wrong, but they can't seem to find out what's making the noise.

I took it to another shop and he said just wait until the pads wear down and get new ones.

 

Are the rotors noticebly grooved or shiny in a certain spot?