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I bought an 88 Comanche a few weeks ago and I am swapping everything from my XJ into it (entire drivetrain, lift, axles, etc.) I knew the floor had some rust but when I pulled the carpet I found this: Which is suprising because the rest of the Comanche is extremely solid, besides the driver side door, there is literally no rust anywhere else. The black square on the passenger side is a patch someone welded in at some point. The driver side had some sheet metal self-tapped in. So, my question is: Should I por15 it or, since I have a donor XJ at the ready, cut that guy to pieces and weld those pieces into the comanche (I have a friend who is very good at welding)? Is my case too bad for por15? If I do por15 do I cut out all rust everywhere or just sand and wire brush it or just use their cleaners and then put it right on the rust? How much will I need? Any tips, suggestions, links, stories, etc. would be very greatly appreciated!