It's an article that appeared on Blendernation that gave me the idea... A blender user designed medals in 3D. But my guess is that they where handpainted after. https://www.blendernation.com/2014/06/30/designing-an-air-for ce-commanders-coin-using-open-source-software/ But it got me thinking there might be a way to add color to medals or jewels printed by shapeways using the cloisonné enamel method described in this wikipedia entry : https://en.wikipedia.org/wiki/Vitreous_enamel Basically, colored glass powder is put where you wish to add color and then put in a oven where the powder fuse into a smooth glass panel. Some cloisonné jewels are quite remarkable when it comes to vividness of colour. https://www.afmetalsmith.com/contents/details/cloissmile.html So... Just putting the idea here in case someone @Shapeways find it to be feasible with their current hardware.