Slight derail: one of my favorite artists is
Dave Archer. He basically creates his "canvases" by spreading isopropyl alcohol on a sheet of glass then hitting it with a Tesla Coil. The IP alcohol/Tesla Coil combination creates beautiful rainbow effects. He then paints the glass on the back, starting with the details first then filling in the background behind it. I am fortunate enough to own an original, albeit a very small one (I understand that he has stopped creating art because the electricity was wreaking havoc on his body).