I am learning to work with shapeways and mostly resolved the modeling and post modeling questions in the context of using the Blender program. However regarding having color printing seems to be another story which may be specific to Blender and not to other apps like Maya or 3DS and the likes. In my case I can export my model in x3d and vrml2. Both are supposed to manage the colors either as vertex mapping or textures. Having no success with a recent model I have started to test using a simple cube, supporting vertex colors on one of his face. I made attempts using x2d and vrml2 without any colors showing up. One question I wonder is : does the uploaded object should show the colors once accepted by the system? Or does colors are only showing when printing and after having selected a material like sand stone that supports full colors? I went through the exported files in x3d and vrml2 made by Blender. Both reference rgb values but I cannot be sure they are the corrects coordinates at the present point. I will look further into that.