It's whatever you like though I, personally, prefer my bottles spotless-- but that's because I like to stage things to look like a snapshot in time, though. Future owners can tumble it if they want.
I gotta differ on this one. I agree that Leon's square needed it, but the Flanagen has a whole different patina going on that gives it a real primitive look that would be lost if tumbled. If it was like the back side all over, I'd say tumble, but the front with all that crustiness around the letters looks neat to me as is. Beautiful bottle.
The before and after Leon looks amazing. Do you tumble your own? I am a sucker for patina but I love the look of a fresh mint bottle pulled out of an attic or wall.