When I lost my water pump and discolored my headers I used this stufff called "Worlds easiest metal polish" It works great, it took off the oxidation very easy without using any tools. I simply hand polished them and it came out great. I have laso used the stuff on heavily oxidized brass. Which again turned out great.

http://www.satingloss.com/metal%20polish.htm

Sox isn't that what you use to polish your pole also?

No way, too abrasive.

Ray

I use Mothers Metal Polish. Mine have never got discolored but it does a good job on the shine.........