Hey. I want to make a cyborg ninja helmet from msg to use as a display model. I have finished gluing the pep and was wondering how to strengthen it. As I have read most people strengthen the inside of the helmet with resin and fiberglass but I already have some generic auto body filler which has glass fibers in it on hand and was wondering if i can cover the inside of the model with that and use regular auto body filler on the outside to smooth it out and shape it further. Would this work? I really don't want to mess with resin. Also any ideas on how to make red dome for the "nose" part?