One antiques website I was on suggested using the RED rubbing compound
Turtle Wax sells. They say to use an old soft cotton cloth (or a
something like a sock), apply a small amount, and work it in until it
looks 'burnished'. Then you use it to carefully work your item.

It is supposed to remove only the dirt, without strippin the patina off,
and is recommended over 0000 Steel wool & wax/spirits.

Haven't tried it myself, but I did pick a tin up - it's only a couple
bucks and should last forever.

for what it's worth.

paul morin calgary, ab www.cranialstorage.com/wood

> You might try "Brasso" which is a brass polish with very very fine
> polishing grade grit. The other product that springs to mind is "Bar
> Keeper's Friend" which comes in a gold looking container. It's a
> little bit like comet cleanser onlymilder