Yep, Brasso should clean it about as well as it's going to polish up ever again.
And, as far as tuberculosis germs, if you're nervous about it, soak it in a 10% bleach solution for an hour or two. Takes care of most things, up to and including most viruses. I'd be more leery of the old rheumy codger running the antique mall than catching anything 'free-living' on the surface of an old, dry spittoon.
Regards,
Rabbit.