Paperclay is air drying. I did use polymer to start out with but detested it. For me it cracked, broke easily and burned when I would cook/cure it. Paperclay is nearly indestructible and is easily repaired. I can also take off, sand or rebuild it if it's not where I want it to be. That's very difficult with polymer clay. As for wax. I am not casting these right now and wax melts in heat. Had that happen before! I also like the porcelain look of paperclay. Thanks for asking