The move is as follows:

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> You may use your hands in place of tools and fire to craft metal objects. Mundane weapons, armor and metal jewelry can all be formed from their raw components. You may unmake these things, as well, but to do so without time and safety might require that you Defy Danger first.
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> 
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How does one handle this move? The answers I'm looking for are along these lines: time requirements, cost of raw materials, limits on things to be made, etc. 

I had an Immolator recently make an entire set of armor for himself and made it take like a week (since he basically molded it to his own body). This move is so open-ended.