I have a damascus barreled shotgun and was wondering if the bronse bristle brushes will hurt the barrel. I've been putting the cleaning rod tipped with a bristle brush on my drill and removing the leadding/fouling with it. It removes the leadding/fouling well (especially with some Kroil in the barrel) and while I wouldn't give it a second thought on a modern steel barrel, I was wondering if I'm 'eating away' at my damascus barrel at all or if the bronse brisle brush is harmless to my barrel.