Got 8' of the floor ripped out to the metal today.
It was rubber, then plywood, then more rubber before I got to the metal.
Water was apparently coming in the hole in the floor for the fuel filler neck and creating mold in the back, but good news is there is no rust. The floor looks like it is galvanized or something.
So, what do you think would be the best way to lay the new floor? I'm thinking of sealing all the bolt/screw holes with automotive seam sealer, then a coat of TremClad, then plywood, then laminate underlay (the thick stuff you use over concrete in the basement - It has a built in vapor barrier), then laminate flooring.