Saved by a pencil!
I found another use for my Inktense pencils: coloring elastic! I needed a strong answer to a button loop around a metal stud. The first one, of thread, wore out quickly. But a white piece of elastic would stick out horribly. So I took my pencil, drew on the elastic, and then painted it with water to spread the color, which is what you do with these pencils. I then heat set it with the iron till dry and voila! Matching elastic loop, happy sewist! (NAYY)..............Bunny