Super old thread but do you happen to have a working link to the helmet pepakura file? I have someone who is looking for one and all the links I find are dead.
I have seen people implement C02 using a portable c02 bicycle pump. Though they use proprietary 16 gram cartridges, it is possible to modify it to fit a standard paintball tank. Hope this helps!
It's good to stick to flat1 or matte finishes when working on a battle damaged suit. I don't usually stick to certain brands but I've never had a bad can before. Typically Rustoleum and Krylon brands. If you are doing scratches in the armour, it's good to use a shiny metallic aluminum on a dry...