A couple of thoughts. Your definition of "pretty beat" may vary with others' observations. Use means character to many; once done, you cannot go back. But, search for those who do refinish as close to original factory AS POSSIBLE. Suggest you contact Dan Tanko to discuss......he is Rugerguy on the other RugerForum.com...Tell him I sent you.
Ruger will give you a duplication of the original factory blue job and a very reasonable price. If you want a higher polish or deeper and shinier blue try elsewhere. You can start with Dan for either, he knows Rugers!
True they will convert it, but there's no permanent modifications, they will return the original parts and the owner can put them right back in. Or the owner can keep the action parts if there's any doubt about getting them back. That's what I would do.
It won't be original after the re-blue anyway, but have about the same or a little more value as it does now with very worn finish.