I'm afraid Shapeways have recently increased their prices on WSF models. Recent communications with customers suggest the White-Strong-Flexible material is more than suitable, but does need a primer-filler (Auto-shop, 'Duplicolour') paint to smooth out the 'powdery' finish. Similar to the 'pig' trailer but with a cyclone, more trunking & pipework detail. The images shown are of the 3D CAD model, although I have since made some improvements to pipes & hatches. My thanks to Prof. Bill Guegold & Monty Schneider for pictures of their trailers.