I have an 03 crewcab 4x4 with 4.7. I just removed my bed liner to find significant rust around the tops of both wells. Question is, I'm sure im not the first, so does someone have a successful repair process? Im looking for another bed but thats turning out to be difficult. I would rather do a repair as good as possible. the sidewalls seem solid,but if I start grinding it may go further.