Didn't see this thread till too late. I work with thermal plastic and to get it hot enough to mold it goes into an oven that is controllable up to 230c. It looks like a huge pizza oven that holds 20 large wire trays and each one travels through the oven taking about 10m to 30m again controllable. I think I could have got permission to do your playfield as my boss loves pinball.
That's cool I'm actually glad it didn't work the old plastic had big scratches and compared to the shiny new on would have looked shit anyway.
Thanks anyway