OK, so the same kind of black iron oxide coating as on "black" steel pipes? You just helped me make sense of something told me by someone over 30 years ago -- about stopping a piece of steel from...
Type: Posts; User: Cordite
OK, so the same kind of black iron oxide coating as on "black" steel pipes? You just helped me make sense of something told me by someone over 30 years ago -- about stopping a piece of steel from...
With "rust blue" do you mean traditional browning like this example?
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