rhodesengr
Member
- Joined
- Jul 12, 2021
- Messages
- 133
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- 70
I have both a 617 and a 686 Competitor that I most use with 38sp. I get carbon blackening on the front of the cylinder. What is a good compound to easily remove that blackening? It does not easily wipe off. I have tired several gun-specific and generic cleaners. Hoppes #9, MPro-7, Marvel Mystery Oil (which does a nice job in my shotguns), and miner spirits. They don't touch the blackening.