Pros : I love this finishing compound. It cleans any remaining gunk...glue, marker lines, whatever....from the glass. Both the glass and your solder lines shine after a good polishing with this compound.
Cons : It removes a little of the patina. Black comes out a pretty gunmetal color. Copper on the other hand really brightens and shines.
Other Thoughts : It's a little hard to get the residue out of small pieces and tight areas. I've found using a dampened Q-tip works wonders. Don't kid yourself, though. The wonderful shine comes from elbow grease as well as the Finishing Compound!