How to brown a gun barrel with vinegar?

To remove rust from a gun barrel, you can use several different methods. One popular method is to use a vinegar-soaked cloth or brush to apply the vinegar to the barrel. The acid in the vinegar will eat away at the rust, making it easier to remove. You can also try using other acidic liquids like lemon juice or citric acid. Rust removal can be a simple and effective way to keep your gun barrel in good condition.