Other option is a 'polishing mops' kit from ebay and an electric drill. Typically comes with 3 different 'mops', a couple of bars of polish and a taper for mounting the mops to the drill.
I start with 400 grit wet and dry using water[spit] as a lube.Then on to 800,then 1000,1200 + so on.
Then on to OOOO grade wire wool
Finally autosol metal polish on a soft cloth