Would someone kindly point me in the right direction. For several weeks now I've been trying to come up with published techniques when using multiple Fiebings dyes (in my case on shoes and belts) separated/protected by some sort of resist or technique. I'm accustomed to using paraffin in a pottery situation to either prevent the clay from receiving any color (at all or at that moment of the process - or to protect a final step while completing colors in another section). Is there a corollary in using Fiebings' dyes? I've gotten reasonable good at blending in the dyes creating a patina, hue or amalgam I like. I am unable to discover a product or technique that will enable me to create crisp lines.