I'm not a maker or repairer; just a player and enthusiast. My question is this: what do you experts believe is the best way to darken a lighter rosewood board? I know certain oils (lemon, orane, mineral, etc.) will darken somewhat, butare there better,longer-lasting solutions such as black leather dye? I'm a little fearful of dyes on my rosewood and I still want to have the grain showing. Also I don't want to damage the inlays or frets. Thanks!