Metal is listed in a few places. You're told how much metal it would take to do unit repairs, for example.). FEI even has wood listed as a resource in several places. But none of it actually does (did) anything. It was removed from Dwilight daily reports for that exact reason: Pointless cluttering of the message system with meaningless junk.
But wasn't it implemented on testing for a little while? I remember seeing them on BT, and people talking about iron and everything, but it might have just been a preview phase that got removed afterwards. Kinda like armies' organization %.
