Well, that's an ugly mess, requiring cleanup and rust removal. Beyond that, is there any damage that prevents a standard electronic restoration?
I know mice can sometimes chew up coils & whatnot, and that may have happened here. But before writing off the chassis, I'd at least clean out the underneath and do a careful visual inspection.
Regards,
Phil Nelson
Phil's Old Radios
https://antiqueradio.org/index.html