I was just detailing and when I got to my rear bumper I noticed that imbedded in the paint there are rust spots. It almost looks like rusty metalic flakes. I was wondering if anybody else has run across this. It feels smooth so it is not from a grinder or anything like that. It appears to be under the clear coat. If it is on the clear coat maybe I can remove it with one of those clay bars I hear everybody rave about. Anyways I just thought this was kinda wierd being that the bumpers are made of plastic.