Originally Posted by andrew
wow... that is scary...
i would guess a possible flood car... or a poor job of a new door skin replacement.
it just doesn't make sense for rust to form in that area... naturally in such a short period of time.
I haven't seen rust anywhere else on the car. I found another member that posted a while back about having the same issue. As it turns out some drainage holes were clogged on his doors. I'm guessing it could be from washing the car and having trapped water sitting inside the door. The only way to know for sure would be to open it up, but I'm afraid of what I might see.