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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. I've not modelled the wheels as I'm sure there are better items available in this scale. My thanks to Kent Loewen for the photo of his Shapeways S-scale trailers, straight out of the box. Can't wait to see them painted.