Cold1,
I really like your project. I’m a fan of single barrel shotguns. Please share more pictures and info as you can. How did you accomplish the French gray finish? I like that finish. As I understand, that finish is often achieved by first color case hardening and then rubbing the color back to gray. I’ve done some simply using Brownell’s Oxpho Blue applied in multiple coats and rubbed back with a Scotchbrite pad. Again, please share what you can about your single barrel project.

Larry