I'd toss it, or shelve it as a reminder that they're not waterproof.

It's too deeply pitted, will be missing too much metal after all the bad is removed.

With a little thrifty shopping, you should be able to pick up a clean 802G/808B body for less than GPA is going to charge you for a new front plate. I suspect the polepiece under the phase plug is probably ruined as well.