Lack of oxygen, proper charcoal, ideal temperature and perfect timing.How does one get colors like this in case hardening?
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Chris Dawe is a world class restoration specialist in NFLD ! His company is Stillwater Restorations.
He does AMAZING WORK in all aspects of the restorations !!
https://stillwaterrestorations.ca
This is a pic of his color case hardened receiver for his Mattie gun upgrade !! Check him out...he has a gallery of past work photos too !
He did a great job for me on my shotgunthere is a guy named Oskar Cobb out on the east coast that might be able to do what you want, i've seen his color case hardening and its lovely
i'll try to get contact info for you next time im at the gun club
-T