In the spirit of sharing, here's a link to a youtube video where a knifemaker polishes out a hamon. Long story short:
2. polish with 5 micron aluminum oxide powder in water with a hard rubber block
3. lemon juice etch
4. repeat #2
5. polish with 8k (1 micron) micro-mesh.
At around 17:30 he shows the finished blade, and it will knock your socks off.