This was before I took the Laser Cutter SBU at Techshop so my templates were drawn and cut out on cardboard. Since then i have cut all of my templates out with the 40 watt laser, and I would strongly recommend using this method. For more info on Laser cutting templates check out my other instructable How to Make A Buckler from Sheet Metalhere
. I just went online and found a helmet style that I like and drew half on the computer then printed it out, traced it onto cardboard, then flipped it and repeated. I then cut out the whole thing and laid it nicely on my metal as shown.