I'll be interested in the replies to your question, SB. I have read and reread Oscar Gaddy's treatise on case colors many times and I am always left wondering if, and how, any chemical could change the crystalline/prismatic surface which creates the colors and patterns. Of course, RUBBING with any product could do this because any abrasive action alters the prismatic structure. In the same vein, I have always wondered how direct sunlight could fade case colors, as some claim.
Thanks for asking, maybe I'll learn something from it, too.
SRH
