Nice job!
I did actually try shaving off the 3k on a razor I was honing, and I too was suprised at how good the shave was. I'd been thinking it would be like dragging a saw blade across my face but it was pretty smooth and comfortable.
It just shows that by the time your razor comes off the 3k its basically as sharp as its going to get. All the higher grits are just further refining that edge.
Thanks for sharing!