Using fire with alcohol ink! Gets some really interesting results. I tried it tonight on metal but I was working on pre-formed cuffs and -no big surprise- because of the curves I couldn't build up enough alcohol in one spot to maintain a flame more than a moment. I'll try a flat piece tomorrow.
Every now and then, there is a merging of product lines that is wonderfully helpful and organic. Recently, Vintaj (a line of metal jewelry components) has teamed up with Ranger to create a specialty line of metal paints. Here's how it's described on the website. Vintaj Patinas are opaque inks