Hot Spots?

[Arub]

I noticed dark spots on the raised part of the cylinder of my 686 after shooting. They seem to come right off using some elbow grease and a rag, or at worse case used of a brush.

Have a fairly new used (circa 1992) model 29 I just got back from the range with and it has lightish colored spots on the raised part of the cylinder in pretty much the same place as the darkish spots are on the 686 cylinder (at the casing lip). Used solvent and a soft rag and then WD-40 and a soft rag to try to remove - no luck. I'm afraid to get aggressive trying to remove them.

1) Are these "hot spots"?
2) How to remove them on a nicely blued and preserved older (circa 1992) gun?

Thanks in advance for any suggestions.

 

[kritter]

I'm willing to bet your "hot spots" are located right under the front mounting screw of your rear sight..

when you fire a revolver the "fireball" of burning power, soot, exc.
is actually huge, both out of the muzzle and the cylinder gap.

the gases flowing rearward will hit the little indentaton caused by the placement of the screw hole and actually "swirl" for a millisecond causing the markings..
just use a good solvent, like hoppes #9 and let it rest wet on the cylinder for awhile to soften up the "crud" then it should wipe right off..

 

[Arub]

You're dead on with the location.

I had applied gun oil to the spots yesterday evening and let soak overnight. Only a marginal improvement, if any, when wiped down and scrubbed with a cotton cloth. Will apply solvent and let sit then try to remove today.

Thanks

 

[Arub]

As a follow up:

Spots gone!
Had to use a brass bristled brush with light pressure along with the solvent. No scratching of bluing.

Will be looking for a nice 629 shooter and put this 29 in the safe - too nice to screw up the finish.