I've schmutzed about everything on my ol offhand shooter stock and saw no ill effects where the balistol ended up. This includes but not limited to: bp fouling, linseed (leaded) oil, grease of many types, blood, sweat and not a few tears.
I must stress that this ol girl is a very plain Jane or John shooter, so a few dings here and there (and she has plenty) do not bug me too much nor the shootin!
I use it in the bore between shootin a few days, and in the lock although I would not spritz the lock with it for long term storage. (Gets a mite waxey).
Of course thats just me and I am usually swimming against the current.