When I made the knots posted earlier on this BLOG, I used pink fingernail polish to stiffen up the ends of the cord. A drop of polish fell on the paper I had under my work. I grabbed a tissue to wipe it up and got a smear. Of course. I was about to throw out the paper, but I just looked at it. Then, I went and grabbed the light pink and bronze polish that I have and started playing. This is what I got. Kind of interesting, I think.