At KiwiMill we use 3D printed parts to make some of our models, depending on the design and purpose of the project.
For a recently made MATV military vehicle, the doors were 3D printed out of plastic with handle, hinge and window details. The part was grown over night in the 3D printer, taken out and cleaned up.
The part was then primed, painted and given additional details.
Here is the door on the completed MATV vehicle. The printed part blends in with all the other materials that were used to complete this model. Our model maker chose soldered and braised brass for most of the model for the strength and endurance necessary in a trade show piece.