I have some rust starting on the box side just below the gas door. Just bought the truck, but did notice that when I filled up the other day the pump didn't kick off when the tank was full and it overflowed a bit. Not sure if it was the pump or if for some reason the truck, but I'd assume it does that fairly often since it's rusty there. Gotta go get a quote to get that taken care of.
Other than that, my truck is clean, I'm in the western UP of Michigan, lots of salt over here. My truck has that rock guard stuff along the bottom of the body, might be a good idea to get that done. My frame is very clean, I'm thinking of getting it undercoated but not sure if I have to.