I am making some 3D parts that will be used to make a mold. Before molding one needs to get the parts virtually perfect since the urethane replicates even the finest details. I have made a few 3D parts in wood, but the time to get them ready for molding is a bit more than I like. I have made a number of 2.5d pieces using King Starboard, and it works fantastic since you can easily sand off the tool marks and machine the wood using normal woodwork tools. I am considering milling the 3D parts in Starboard as well now, but I have not tried 3D milling in plastic before. Any thoughts, experiences or another material suggestion?