Topic: Single Extruder Multi-Color Prints are here
I know people have asked about joining two colors of filament on here before...
https://hackaday.com/2016/06/20/mosaic- … -printing/
http://www.mosaicmanufacturing.com/
Filastruder
NYLON (taulman): http://www.soliforum.com/topic/466/nylon/