I used card stock then coated the whole thing with bondo fiberglass resin to get it hard "at this step you can heat it up with a blow dryer and bend it to it make it contour your head better". Then i used more fiberglass bondo and fiberglass mesh squares to line the inside to reinforce it "only...
Thanks for the file JF. I built your file out of card stock and made it into a pretty nice helmet. This was the third try after some silly mistakes, but my first project. Had a lot of fun and huffed a lot of bondo.