Where in the country was it? I’m genuinely astounded by the apparent lack of rust
jacking points are all good as is the entire underside, on the panels there is really no rust that is a worry, it seems all the panels have also been waxoiled on the inside including the doors, pillars etc etc, the minor rust is from outside and not from inside out rot, bloomin marvelous survivor and cant wait to get back to it's former gloryDoesn't look too bad at all, check the jacking points they tend to be worse than they initially look. Getting all those suspension bits off cleaned and painted will makes a big difference, what's the body panels like, generally if you can see rust it will be worse when you start to clean it back but I have seen much worse good luck
I remember ziebart but was never that keen on it as it had a tendency to harden/separate and allow moisture in, I always waxoyled my motors in the 80's and 90's, the clear stuff was great, did all the cavities with the supplied hand pump sprayer with cavity 360 tube and then just used an old paint gun with thinned down stuff for all underside/running gear, fantastic stuff for rust protection as always remained oily non hardening and would get into all the seems on bodywork, there seems to be far more waxoyl type manufacturers these days and heard that bilt hamber dynax s-50 is the stuff to use as it's the best on the marketBoth of ours had Ziebart / Waxoyl from new.....