Which pourable plastic? I'm using Smooth-On Oomo 30 for my silicone mold, then task 10 pourable plastic. The mold turned out nice, but I can't for the life of me get the bubbles that form in the plastic out. The guy at smooth-on said I needed to bake the moisture out of my mold and I tried that, it helped but I'm still getting tiny bubbles forming in my plastic? Maybe I need to bake it longer?