Your design, as it looks from the screenshot would be quite hard to print, it will definitively require support structures, those leave marks. With a sanding, heat gun treatement and an acetone vapor treatement, I could probably pull it off.
PM me if you are interested. Make me an offer . I will only expect any payment after you are satisfied (pictures, shipped, etc...).
Here are my Thingiverse credentials: http://www.thingiverse.com/jothan/designs
and this is precisely why i don't like RepRaps. without support structures, it's really limited as a 3d printer. shapeways offers printing in nylon based plastics (selective laser sintering of powder) a sandstone like material and steel (printing glue into a powder) and a few others too. great results, i've found. for now, jothan, i'll pass. (besides, i don't have any money to pay you...)
Thanks for the reply. I'm planning to move to printing nylon and polycarbonate this year if the prusa nozzle comes out one day. No problem for passing, I am always eagerly looking for a new challenge.