I apologize if this has already been covered in another thread, but if it has, I can't seem to find it. I recently ordered my first brass mod (hcigar caravela) and I would like to try to achieve a forced patina look on at least one of the three included battery tubes. I stumbled across this picture of an absolutely gorgeous nemesis, but none of the videos or articles I've found seem to create this look. can anybody help me out as far as either giving me a step-by-step process, or a link to a video or article? any help would be greatly appreciated, thanks.