This idea was so much better in my head. I've been wanting to do a fake tan ring for a while. I thought I would use yesterday's ring like a stencil with an airbrush self-tanner, until I actually read the directions on the tanner label. Self-developing? Is that safe? You're only supposed to use it once per day, and I figured I would need several applications, so I gave up on that - I am more important than the work!
I used bare leg tanner, "It's like pantyhose in a can!" It certainly is pantyhose color. I sprayed it on and let it dry, but the letters did not come out, rats.