Nem vas van ott hanem Aluminium. https://www.quora.com/What-types-of-materials-is-the-International-Space-Stations-exterior-and-interior-made-of
The most common material is 2219-T6 aluminum alloy. Most of the ISS structure is aluminum. In fact, the Node modules were each made from single blocks of aluminum.
Kompletten újrahasznosítható és újrahasználható lenne a holdon (is).