Hey guys. So I have already posted about this before but I got no replies and my project adviser suggested that I start another thread. My name is George and I am trying to make a replica Iron Man Helmet as a project. I am making it out of an EVA foam and basing it off of a template that I found online. Thus far I have a full paper model shown in the pictures. I am currently working on a foam model but have come up with a problem. I am looking to finish the foam with something to make it feel more metallic and rigid on the outside, but I do not know what to use. So I guess my main question is what should I use on the outside to make it hard and rigid?