Recently I've been experimenting with sculpture in polymer clay. Took my first few sculptures to Boskone this year, and won two ribbons, a "Judge's Choice" award for the Bridge Troll, and one for "Best 3D."
My biggest problem has been the fragility of the polymer (Super Sculpey). It's been cracking, a lot. One statue, the Morrigan, got totally trashed on the trip back from Boston, despite being carefully packaged, swaddled in bubble wrap.
Web research has confirmed that most sculptors in this medium seem to recommend baking it longer, at lower temperatures, than the manufacturer suggests on the package. Unfortunately, none of them seem to agree on exactly how much lower, and how much longer. While the Super Sculpey package warns "Do not overbake," the one sculpture I left too long (or what I thought was "too long") darkened a lot, and turned rock hard. Since I'm painting them, I don't really care about the color change. So I'm thinking maybe the longer the better.
Before I bake any more actual sculpts, I'll be running some experiments and tests to see what works best. If anyone who has worked with this medium wants to offer their suggestions or formulas, I'm definitely up for hearing them. Thanks.