Thanks for playing! Working hard on the KS version as we speak, so I’ll add some clarification into the revised rules. But to answer your question, Supply takes one inventory until it is used. Once it’s used for repair or revealed as another common object, it stops being Supply and becomes that repair or other thing. Supply is the potential of something, like Schrödinger's Cat. The reverse transformation is impossible, BUT a reasonable scrapping of something to repair something else would always be allowed. Say there’s a broken telescope, you could use googles to repair it, or an empty oil drum and a blowtorch could repair some armour. If it works in the fiction, the story you’re telling, it works in the game. Hope that helps.