Alot of the guys that paint lures use a clear coat between layers of paint. For instance, if you have a base layer that you're happy with, clear coat it and then after that dries, you can do gills, fins, scales, etc. and if you mess up you can wipe it down and you still have saved the base you were satisfied with. It also adds "depth" to the look of the lure. The only thing is, each layer of clear adds weight, which may affect the lures action or buyancy if you get too much.