Watching Little Wars TV's excellent Normandy game inspired me to paint up some of my nano-scale miniatures. These 1/600 Germans are from Oddzial Osmy (available from Pico Armor in the US).
Those are 1" rounds, so you can see that the figures are tiny! Each figure is smaller than a grain of rice.
We paint 6mmm but not so well as you do with 3mm!