Thread: Borescope images

Never seen rust like that in a stainless barrel. Rust is usually a mass of pitting or worm tracks and that is not apparent here.

Seems more like a coating that is burnt on. Try wrapping a bronze brush with patches and bore paste, with a bore guide and stainless cleaning rod....give it lots of passes and check a specific area by marking the borescope position......it should come up bright and shining. It needs to come out otherwise corrosion is guaranteed to work away hidden underneath.......!