@ mkroeker, if you noticed, Aaronjagger17 asked for "smooth and polished with no rough surfaces" material, so you must have a sense of humor if you recommend the strong&flexible nylon as the "probably best" material. You are an experienced member here, so I am sure that you already know that strong&flexible nylon is not smooth, is not so-polished (even if ordered as "polished") and does have rough surface.
As for "smoothness" and "polish", both "Frosted Detail" (FUD & FXD) materials are the best materials available (so far) for Shapeways 3D printing and no other grainy (like the strong & flexible nylon) material with visible printing layers is able to compare. Since pictures speak louden than words...
Frosted Detail plastic
Strong & Flexible nylon
Last edited: Mar 26, 2017