Hey guys, long story short I had my car at the autobody place correcting some work they messed up on my trunk. I picked it up last night and they detailed the car and cleaned off my wheels real nice but when I got in to drive it the brakes sounded crunchy on the first few initial pumps... I drove it around the parking lot and it went away pretty quick and haven't heard it since. I'm guessing they knocked some rust loose or something, but any other opinions?

 

Just some rust build-up