Here is my painted radar eye. There are some imperfections on the piece that I chose to leave "as is". My design is not going to be too worn, but I don't want him having a "fresh out of the factory" look either. Slight imperfections, chips and scratches are welcome here.
On a side note, I finished cutting my pie panels out of the dome. Two panels are painted and complete. Four more with base coats of paint are currently drying. I chose to go with Rustoleum's Cobalt Blue Metallic without the purple undercoat... not quite true to Artoo's coloring, but close enough for my droid.