Hi, this is my first attempt at a helmet it's based on a mandalorian helmet from star wars. I know it's rough, nothings straight, needs planishing and some welding. I've done a little copper work not much besides flowers and a little "repousse", so advice is appreciated. I started tig welding the cuts,using oxy brazing rods, but I ran out of argon and then tried to use 72 25 but that was a mistake,lol. So my man question is how can I flare the neck part of the helmet. Any help appreciated.