I wouldn't soak it in water, period.
Wipe/spray it down with ballistol (since it's mild) and let it soak... re-apply if it dries or absorbs and give it a day or 2, then scrub with a stiff nlyon brush.
I have also use oil in the past- soak it with oil and let it sit for x days. Sometimes just the moisture of the oil will absorb & soften the crud and then it will wipe or brush off. I don't know much about the old finishes so I won't suggest specific cleaners that are stronger or more aggressive.
Lots of knowledge here about the older guns- hoping someone will chime in soon.
Wipe/spray it down with ballistol (since it's mild) and let it soak... re-apply if it dries or absorbs and give it a day or 2, then scrub with a stiff nlyon brush.
I have also use oil in the past- soak it with oil and let it sit for x days. Sometimes just the moisture of the oil will absorb & soften the crud and then it will wipe or brush off. I don't know much about the old finishes so I won't suggest specific cleaners that are stronger or more aggressive.
Lots of knowledge here about the older guns- hoping someone will chime in soon.