Thanks for the question. The band is made from nickel silver tubing that I happened to have from use in another hobby. It machines well (on a metal lathe) and can be left silver in color or blued easily, so seems useful for this application. I have also thought about trying to make clips from NS sheet and could then match up with the band. The bluing is done with Birchwood Casey Brass Black, which works well and is pretty easy to use. The patina will wear off if unprotected. This band was dipped in a jeweler's lacquer, which holds up pretty well (at least in the other application I have used it for). Spray lacquer would also be protective but likely harder to get a good finish. Happy to answer anything else.