Okay, I know I'm sounding like a total newbie here, but I've never shaped sintra before. All I've used for my armor (custom mandalorian thingy) was a garbage can and it was already shaped. I was also wondering if I could just use the sintra as the armor itself and not a base for the whole expensive vacu-form setup. Also, does it get beat up really easily or is it semi-resistant to impact (A.K.A. paintballs).