If you've ever tried to smooth a print, you know how much time and effort goes into eliminating print lines. You've undoubtedly wished that there was an easier way - and thanks to researchers at Waseda University, print smoothing may soon be as easy as coloring with a marker. The researchers named the process 3D Chemical Melting Finishing (3D-CMF), and it's simpler than it sounds - the pen-like tool is used to selectively apply solvent to a finished print in as small or large an area as you choose. The solvent in the pen melts the raised ridges, and the melted resin then fills the indented grooves to create a smooth surface. Read more at 3DPrint.com: http://3dprint.com/167691/waseda-university-3d-cmf/