Hi Dylan,
From what I understand, once you start extruding a type of filament then you are locked into that material, because there is no easy way to clean out an extrusion machine. The nozzle and auger assembly would have to be replaced for each type of material/color. This could add up quickly. These parts (and possibly others) would have to be changed for every type of material.
brass plug
iron nipple
steel auger bit
iron floor flange
What types of material are you considering testing out?
