I never really finish a project. A Persian rug always has one knot tied wrong because nothing can be perfect. I hope, at best, to amuse the leather gods with my inept attempts to mix it up! Today I know that that Bombay ink is a vivid dye. You can engrave Poly. Liquid leaf is permanent on poly and leather.
PS did I mention I never finish a project? I also bought copper sheet today. With my new engraver maybe I can get closer to done with Mjolnir