An interesting article. I wonder what tools the crew had available for working metal. Even hand tools would suffice, given the 30 days to work on it. The idea of holding things in place with ice doesn't seem viable to me, ice would melt really fast. I'd go for screws, rivets, bending and hammering, etc., to get a mechanical connection.
Basically, just pile on enough metal so that there'll be just enough left as the rest of it burned away.
Basically, just pile on enough metal so that there'll be just enough left as the rest of it burned away.