I use finger nail polish to color blades. I wipe them down with clean acetone, let it flash off, and then coat with the polish. Most of the time I just add flash with Sally Hansen's "In The Spotlight" polish, which has mylar bits in a clear. For dirty water, and low light, I add some white glow powder to a bottle of clear, and coat the concave side. Once it's dried, I coat both sides with the "In The Spotlight" polish. I figure the whole point of a lure is to get noticed so the more flash, the merrier.