Pitting/Corrosion to Vintage Datejust

[Rtiger80]

Hey Everyone,
I just purchased a Datejust 16030 (1978-79). I took it to RSC in NY and they recommended a new case frame due to corrosion. I understand that this corrosion can compromise the waterproof ability of the watch, but this won't be for diving or even daily use for that matter. I've read that for a watch of this age, pitting and corrosion are very common. In any case, the price for all of RSC work is exorbitant and far more than I had bargained for. If I skip getting a new case frame, am I playing with fire? Should I just get the movement overhauled by a reputable watchmaker, new acrylic and a polish and call it a day? Any advice would be greatly appreciated. This forum and all its knowledgeable members have been an invaluable resource of info.
Best,
Ron