Are you aware of the fact that Allan Cole produces a purple rainbow pattern on the lures he makes. I also think Luhr Jensen produces one in the AC Plugs that they make. Some amazing detail can be achieved by ultilizing an airbrush. One of my mst unque rainbow patterns was achieved by a friend using markers such as the Spike-It and others for the fine detail, for the most part it does not look like it was colored using marking pens.