It's probably brake dust, but I'm still wondering if any of you have the same occurance. I wish I had a picture, but I'll try to explain in words where the rust is:

In the front wheel wells, there is a nut that is screwed onto the part of the springs that kind of sticks out (ie: front center of wheel well) just above the tires. That nut and the thread it is screwed onto appears to be covered in rust. Does anyone else have the same occurance? Thx