(07-23-2018, 12:07 AM)Cino Wrote: I used a bench polisher, but you could use a dremel if that's what you have. I didn't touch anything under the cap so as to avoid disrupting tolerances. I started with black compound to cut the bead blast. Then brown compound to remove the scratches left by the first step. I polished with white compound. Go slowly to obtain a uniform finish before proceeding to each finer grit.
I used liver of sulfur to force the patina. It's a concoction of sulfur containing oxidants that does beautiful things to copper, the major ingredient in bronze and brass. Read about how to use it safely because it is an oxidant and also releases hydrogen sulfide, which in addition to smelling like bad eggs, is toxic.
After forcing the patina you can enjoy it as is, or use a mild brass polish to selectively remove tarnish and give the piece a more natural worn look.
Don't use ammonia. It's too corrosive and won't give you the look you want. I've heard of people sealing the metal in a plastic bag with hard boiled egg yolks, but I've never tried that myself and I don't know if or how it works.
If you end up not liking the look, it's easy to remove all of the tarnish with a mild brass polish.
Good luck!
Way too advanced for me. Lol
Would you consider charging for a service?