After a little elbow grease, the ol' girl cleaned up pretty nice. I added a set of suitable grips and an adapter from the grip box. They'll do until I choose a proper set of grips for it.
I believe it has been bead blasted at some point in its life, as it's definitely not the normal brushed stainless finish. Should be easy enough to have it re-blasted if I choose to.
Now I need to find time to get it to the range for a test firing...