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Thread: Do Puma's have black spots?
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06-22-2009, 08:59 PM #17
- Join Date
- Feb 2007
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Thanked: 155It's oxidation, but not rust. Carbon steel does this unless it is either 1)polished regularly or 2) protected using oil or some similar coating. I have a number of blades that are completely grey except at the very edge. The good news is this type of oxidation actually protects the metal.