We'll see how the water mod works on it. Just soak it in hot water and put it back on while soaking wet, and stretch it out and pose it while still wet and leave to dry.
It's also a good trick to use on your 1:6 figure's clothes. Minus the stretching, you can get their clothes into some better positions to match their poses and it'll dry nice and stiff like that. (Why do I see some perverted replies coming for this ) And to give them a good dingy look, use a dark coffee. I did it to all of my Jason Voorhees figures and they look great.
cool, I Am also curious about your Jason Figs, you dont have any pics?