It's not ruined, trust the process! (Rust Bluing)

2025-01-18

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Rust bluing is a very simple technique that allows you to coat a piece of steel in a hard protective black coating. It's basically like rusting it in advance so it can't rust more. It converts a weak red iron oxide layer into a hard permanent magnetite layer. And all it needs is a little vinegar, salt, and hydrogen peroxide.