Dont just build the helmet. Make little chunks. Like he4thbar said, working symmetrically helps alot. If you build half the jaw, then the other half, and break it into chunks, then when you finished everyone, all you have to do is glue eight or so peices together. This is also good for if you accidentally mess up really bad, you can easily rebuild the peice instead of trying to seperate glue or restarting the helmet.Alright I am done cutting out my pieces for the top half of my helmet and onto the gluing stage, is there something I should do in advance, like getting some sort of mold to keep the helmet's shape? I am currently using a hot glue gun to hold the pieces together until I have to apply the resin.
Cardboard supports and popsicle sticks also do a good job of supporting the helmet and keeping its shape, while preventing warping and it caving in on itself during resin