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Roxy Paine Sculpture from Scumak No. 2 (Auto Sculpture Maker), 2001
(www.flickr.com)
Looks like a 3D printer messed up a few hours in. Metal?
Apparently it's polyethylene. It's a plastic.
Makes sense
Wander the gallery. Look at the art. Be polite. If you feel able please post some great art :)