Just as an experiment, I tried brushing a WSF model a couple of times with plastic solvent fluid, the kind used for fixing plastic styrene sheet. Solvent fluid melts a tiny surface layer of the styrene, fusing parts to each other. I had wondered if the solvent fluid would have any effect on the rough surface of a WSF model. After about four or five brushings, it appeared to have no effect at all. That's a pity. Obviously a different plastic compound to the styrene used in plastic modelling sheets. I wonder is there anything else that might be brushed on, that might take the rough edge off the WSF? An alternative to the lengthy and over aggressive Shapeways polishing procedure would be nice.