Initial impressions are not impossible, but probably not worth the effort. Salvage the iron, make a nice power amp with it. That urine will have gotten into every switch, control, transformer, and socket and it will be a LOT of effort to rid it. Its not impossible that the power and output transformers have suffered some damage, but I'd give them a better chance than the IF trafos.
I'll put it this way. I've been known to rebuild worthless junk just for the challenge, and I don't think I'd take this one on.