Wet and dry will take forever and a day....
Have you got a bench grinder, if so get some left and right threaded taper's..
Have a look on the bay for metal polishing kits, make sure you get one with a set of mops and diff grades of soap....
go from course to fine then to buffing...
Be warned it is a filthy job bud...get some goggles and heavy leather gloves as the alloy does heat up..
I did a 1200 Bandit swing arm this way and it came up really good...
