I recently found a low heat thermoplastic used by costumers called Worbla. I did a quick search on conservation wiki and didn't find any results for Oddy testing. I was wondering if any of you have used it for mount making purposes.
It seems like it requires only very low heat to activate and little to no safety gear. It could be a quick alternative to heat forming acrylic sheeting if it passes the Oddy tests. They have a few different products including a brown sheet version that can be painted, a transparent sheet material, as well as castable pellets. Some of the tutorials show people molding it directly to their saran wrapped skin, which is both alarming and intriguing.
Here's a link