I'm new to getting things printed at Shapeways and until today only had 2 test prints in WSF and Alumide which I was really impressed with. Today I received a 2nd order of some actual designed items and was very disappointed with one of the parts I received in Black Strong & Flexible. It's a part with numerous 1mm deep hex shaped pits, many of which I noticed were still mostly or partially filled with powder. I took a small soft brush to clear out some of what I thought was unsintered powder, only to discover that it was actually WSF underneath and the color is just an external coating. This is no where on the material description pages. Is this the same story with all of the non-white strong & flexible materials? Here is the 3d file, and what I received.