Hi guys, I'm using some Shapeways 3D 1/12 flat louvered panels printed in frosted extreme detail material. Life size, they're 1" x 3/4" with 18 louvers. They were still a tad rough, so here's some of the things I've done to smooth them out. Not sure if any of this would work on curved surfaces as well: 1. Swabbed with lacquer thinner (LT) then polished with an electric toothbrush and coarse Tamiya polishing compound (TB/PC), about 2 toothbrush cycles per piece on the louver side. Washed away compound with LT. Helped a little bit. 2. Mixed two part Locktite epoxy cement (cement mixed 50-50) then mixed 1:1 with lacquer thinner and quickly brushed on a very light coat with a fine flat 3/16" wide brush. 3. Believe it or not, I immediately put them in the microwave for three sets of 10 seconds each and it noticeably smoothed out the epoxy without melting the part! 4. Did the TB/PC thing again and let them set a few hours to semi-cure. Helped out quite a bit. 5. Brushed on a light coat of Alclad II grey filling primer, did the microwave thing (it even levels paint on a flat surface), let set an hour, TB/PC'd again. 6. Brushed on a wet coat of primer, smoothed it as it tacked, microwaved, TB/PC'd. That got it almost perfect without losing much of the sharpness of the louvers. Final coats of primer and polishing will finish it off.