Mystery Noise

This has been driving me INSANE for the past week so I really hope somebody here can assist. There's a scraping noise (metal on metal sound) coming from my rear right wheel and no one can figure out what it is. I looked at the brake asembly (drums in back, so lame :frown: ) but I don't see anything wrong.

The noise first started after my coilover kit (tein basic) was installed last friday. I took it to my guys at the shop to see if they could figure it out, they saw nothin wrong. They looked at the bearing and it was fine. The noise continued so I took it to a brake shop and they couldn't find anything wrong either. The guy told me that maybe it was the paint from the drum peeling off and building up between the two halves, but I highly doubt I'd hear that in the car.

I mainly hear it after I've been driving for a while, so maybe the heat from rotation causes it. But I don't see how the metal would expand that much to scrape like that. Also, it definitely gets louder when I make left turns so whatever is scraping is on the inner half of the drum and moving outward. Of course I can only look at it when the car is stationary which doesn't help at all.

Any ideas? I really wanna get this fixed asap, its so depressing to finally have my car lookin good again but now it sounds like SHIT! :disappoin