I recently went to a trade show and saw some examples of 3D prints on a scale that is relevant to prototyping cases. The technology seems to be getting close to making reproductions and I'm guessing in a few years they will make really good functional parts for that purpose.

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Both ZCorp and HP make an unbelievably cool color 3D printer. The resin is infused with CMYK ink as it prints. It even has a built in inkjet with a special film that you can apply to finished products to mimic things like LCD screens or control panels. Hop onto YouTube and search for zcorp or hp color 3d printer, lots of cool videos.