it's likely fine...if you drive the car a bit, most of that should come off (provided it's located where the pads meet the rotor), which it likely is, hence the "weird noises" you mentioned...my car has been doing that too, since it's barely been driven since late March...after about 15 minutes of driving though, it's all quiet and they look more normal when i'm parked...after a week or so, provided it's rained, there's a bit of surface rust on the rotors again, but that's normal.