I can't recommend Dave Laubert from Defensive Creations (in OH) enough.
I had an old MR73 that was beat up and he did an outstanding job on it.
The turn around time is several months, but he was communicative during the process.
Further, he was the only gunsmith I've ever worked with who was actually able to give a realistic quote, manage expectations and do the work in the time he quoted.
My advice: If you really want to do your father justice and pass it on as an heirloom, send it away and "cry once, laugh forever".
I'm pretty adept at most gun things, but treating rust is where I call in the professional help.
Some before and after of my MR73 that @SouthNarc is trying to copy, even though I've got way more class and taste than him...
http://instagram.com/p/CHBiEOXJUjY/
http://instagram.com/p/CaUy4ZCLnX8/