Comment Re:Materials (Score 2) 200
With 3D printing there is little to no waste. That's why it's called additive manufacturing.
The bigger issue is finishing, most 3D printed parts will need some. I'm sure they don't want metal or plastic filings floating around in the ISS, so that could be tricky.
Just do what I do when I don't want to cleanup sawdust or shavings in my house, just pop outside.... oh right.