Originally Posted by r3500vdp
In general for 3D printing to become mainstream, I think printing color is the biggest hurdle. It appears there are now 3D color printers but they work very slow (1 - 2 hours for one object) and very expensive, both in initial purchase and print costs per unit making it not usable for mass resale production of for example airplane models.
I think that is an accurate assessment of 3D Printing. It is still slow, the good machines are expensive, and the surface finishes are limited. The best application is for prototyping and other niche work (e.g., building spare parts in orbit, Antarctica, or at sea).