Hello Russel,
Seems you found a sleeper despite condition issues! I hope others will chime in shortly.
Take your time with any restoration/repairs - keeping it well oiled won't hurt for the time being. A professional will have no problems straightening the blade; I'd suggest to refrain from doing it yourself (without the necessary exertise) though.
The koftgari work seems to be quite roughly done; the fullers look interesting though. Etching the blade would certainly be interesting but you need to be extra careful with the koftgari (also with any cleaning attempts)! I'd suggest you practise with some other blades first...
Regards,
Kai