I have a model which needs to be printed using two or more materials. (For example, two different colors of plastic OR gold and silver for a jewelry). Would it be possible to print these multi-material models in Shapeways ?
If yes, what is the prescribed format to specify the same ?
Not possible right now - you need to upload the parts as separate files and assemble them yourself after printing. (There is some glue code for shop pages half-hidden on www.shapeways.com/labs to allow customers to select multiple models at once)