sumo side projects stumble on small bumps

[penguin-ford.livejournal.com]

Sorry for the text only post but I have a rather urgent question: Is Sculpey waterproof? And if not what do I need to do to make it waterproof? I’m about to begin the process of making about a million stylized sumo wrestler soap holders for all my manly friends but I don't want to invest too much into it if it'll just disintegrate or something.