Full-color printing is generally done with powder, which is more expensive than plastic filament printing, which is solid color (or two-color if using a dial-head printer.) You can get filament in any color--the cheapest is usually "natural" which is undyed and kind of a semi-transluscent, but it's harder to see the imperfections, so I go with colored plastic (the color itself doesn't matter too much, but it can slight affect the print temperature.) Some colors are supposedly more finicky than others, so I just go with white. I prefer ABS for the material because you can easily smooth it with acetone.
Can you tell about printing? What plastics, how do you print support, what slicer is used, how models are polished/smoothed? acetone? What tricks exists for acetone, to keep small details of figure, how acetone is applied (full bath? brush?)
Argh. The only 3D printer I've had access to is an older model of Makerbot Replicator that only prints using a method that doesn't exactly hold up well with figurines and things that don't have some sort of support that comes with the model. In other words, if I tried to print any of these characters (which are absurdly awesome by the way) it would end up with a sagging mess that wouldn't look anything like these.