You're implicitly assuming they'll want those buildings, and I'm not sure they will. Perhaps those buildings will be unsuitable for their activities, or the bui

You're implicitly assuming they'll want those buildings, and I'm not sure they will. Perhaps those buildings will be unsuitable for their activities, or the buildings will be found unsafe for some unforeseen reason. If either of these possibilities occur, the additional time, energy, and pollution you incurred to make the buildings rust-resistant are waste.