Soy, I have used alcohol based aniline dyes on curly maple and it looks really sweet. The last one I did, I mixed up some rose-red color, only I mixed it weak.... I didn't want it red, just wanted to highlight the curl with some rose coloring... kind of a 'blush'. It went really well with the cocobolo riser in that one piece recurve.
I gave the bow to the guy who gave me the curly maple board... 1x12" with the tightest and most consistant curl.