I've been looking around for a hammergun recently. Some of the guns I've looked at have damascus barrels. Of these guns some have been re-browned, some original. Since I've never owned a damascus gun, this got me thinking about the finish.

Is there anything specific that one should do or not do to preserve the finish? Is the finish subject to wear like case coloring from being handled or when cleaning the gun?

(Craig, if you're reading this, I can imagine the smile on your face! )