Is YOUR China Copper mixed with IRON!

They are good, but don't remove heavy leading as rapidly. Also, they contain aluminum oxide abrasive. Though it is fine and aluminum oxide grit is not very sharp, if you polish a smooth piece of aluminum with Flitz and then wipe it with one of those cloths, you will see the surface is no longer a mirror. So you want to avoid using those cloths on high polish bluing. Stainless finishes make it pretty impossible to see.

Personally, I have some of Wipe Out's new lead solvent on order. Hoping to get elbow grease out of the equation altogether.
 
what about the match test? if its steel or has mainly steel in it a match should make it light off like crazy. I am thinking that copper or brass wont flare up and burn like steel wool will.
 
The reason transformer cores are a stack of thin iron plates with insulating oxide on their surface is to stop eddy currents by breaking up their paths
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Cool. I always thought it was so the laminations in your ballast would separate and the noise would run you out of the room.:)
 
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