Depends what sort of shine you want.
I worked my way down to 000 sand paper then used Autosol Metal polish. The amount of shine will depend on how much work you put into it (which will decrease every time you do it!).
I wouldn't bother lacquering it, just makes a mess when it chips. Keep it raw and you can sand out any new scratches and re polish.
http://www.flickr.com/photos/redwheel/6883073632/