I remember back in the late 70s or early 80s buying a product called Rust X bio. It said it was ph neutral and totally safe to use.
The product was a luminous green jelly. Worked amazingly well. Wash off afterwards.
Tried it on my air rifle barrel and it sadly removed all the bluing. Was amazing on tools though
The product was a luminous green jelly. Worked amazingly well. Wash off afterwards.
Tried it on my air rifle barrel and it sadly removed all the bluing. Was amazing on tools though