Rust bluing might be the ticket. It’s my favorite finish for carbon steel. You can do a lot of different things with it as far as surface effects, and it is very durable. Plus, if it ever rusts, you just hit it with some steel wool and it’s like it never happenedThanks for the reply. I have a piece of 4130 that I wanted to try using. Guess I should just experiment a bit, but wanted to see what others may have experienced using it.