Alan Ratcliffe wrote
Just rub the tops of the polepieces with a little fine waterpaper and then put a dab of clear lacquer (or clear nail varnish in a pinch) over them to slow down the reappearance of the rust.
That's a pretty cool tip, thanks Alan!! Won't this affect the tone though? I may try this on the Edge bridge that I ordered second-hand off of Ebay, these things are notorious for losing their cosmo black finish and subsequently rusting. Of course I would be careful not to put it in places where it may affect the function of the bridge.