The dreaded carbon ring???

[Straight Shooter]

I usually do a good job of cleaning. However, do you guys get the carbon ring scrubbed out to bare metal? I have used Boretech C4 and brake cleaner and still can't get it down to bare metal.

 

[BountyHunter]

Montana extreme copper cream with plastic bristle brush and work it

 

[Straight Shooter]

Bounty hunter, do you get it down to bare metal?

 

[BountyHunter]

Yes