Remember that this is a color matching project, so the more color you have the more I have to grade you on. You do use warm, cool and neutral colors but maybe you could change some of the neutral so they aren't gray, but warm or cool neutrals like bluish gray or brownish gray. The hands are really not abstracted at all. Could you manipulate them in photoshop to get the idea but make them not so photographic? You can print and use this but I would make corrections for a higher grade. You can send me your correction if you want feedback.