Probably. Cardboard looks too tacky... What kind of filler do you recommend? Don't have bondo and I don't know where to find it in a third-world country.
I am a cardboard people. Haha, it just looks tacky in the middle of all that metal... I'm sure all the cardboard people will agree with me on this one...
I liked making my AR from cardboard because it was lightweight, but metal would be magnetic. And Wal Mart is great for supplies, especially for cardboard. They sell HUGE shipping boxes that can put out both arm and forearm armor pieces with one box.
I haven't yet, but I'm thinking about soldering it.
::EDIT:: Alrighty then. I'm ready to assemble it. It's been painted and I'm just waiting for my friend to come back from the States so I can borrow his soldering iron. Project should be finished in a couple of weeks.