Re: Cleaning The Syrian!!!
With the brass syrian, it seems you could use a water soluble brass polish. The black is probably more brass corrosion than gunk from the tobacco. If it is green, it is definitely corrosion on the brass. Wright's makes a water soluble brass polish. Just be sure to completely clean out the polish after use. The polish will turn pitch black btw.
I'm a professional trombone player, so I have a lot of experience cleaning my inner brass slide.