My Robot Nation
MyRobotNation makes creating retro futuristic robots a simple proposition. They allow you to build your robot from a basic set of components like arms and heads, then add custom details and even decals. The models are printed using a plaster like process which means the models are self colored.
The robot in the image is around 3 inches tall. You can see there is some surface texture present. This can be cleaned up a bit with primer, sanding and paint if needed.
I cut the arms off mine to make it pose-able and then made a rather silly film with it that you can watch below.