I have had some serious difficulties trying to find a way to polish parts that were made using DMLS. Have you had any luck using any certain technology? Let's put the MMP process aside for a minute...its very expensive and still may not meet certain needs in which then you are really out money and of course an end result you would be pleased with. What about Abrasive Flow Machining? Or Tumbling? Certain medias? I am looking for a little bit of input to polish parts that will be built from the EOS M270 Direct Metal Laser Sintering machine. You can learn about the technology here if you are unfamiliar with it. GPI Prototype DMLS.