Recently purchased/traded for a 1957 Detective Special in very nice condition (tight, excellent timing, vg blue, vg walnut grips). Over the years I always wanted a DS but usually settled for a S&W J frame. But when this one became available @ $350 I had to get it. Anyway, my question is about the plastic /Coltwood grip panels that were factory issued on the early 1950's DS. Is there a way to clean the white residue that most of them seem to have without damaging the grip panels. I've tried several methods but hesitate using too strong cleaning fluids. Ideas are appreciated.