Originally Posted by RTK
If you are using a brass brush with sweets, etc. the blue is coming from that
And the stainless barrel has nothing to do with it.
The Sweets will attack the bronze brush (Good for initial cleaning) but after brushing switch to a swab
or a patch soaked in a milder solvent .
Bore Tec or Butches are good solvents for normal cleaning.
Use a cotton swab to apply the solvent and it will come clean.
J E CUSTOM