Though the "rust" kind of sounds like an excuse to me, I think maybe it "could" be possible in an extreme situation. I have never, in my life , experienced this on any new car or truck I've owned, and I've owned a lot LOL. IMO, rust has nothing to do with this and I believe it is more of a characteristic of the Edge, due to the material this particular pad is made from. My son bought his new F150 the same day, a two car deal so to speak, his does not do it. I know, I'll hear, it's truck brakes. It's annoying if anything else and I know it won't hurt anything.