USAF,
I would forget the Murphys and use the BLO and a copper scrubby very sparingly. The BLO will float the crud and then you can wipe it off with a towel. You'd be surprised how good a cleaner the BLO is. If your stock is really crudded up a heat lamp will draw the oil as will a good ole sunny day! I just don't like using water based cleaners on old stocks as they can cause cracking or worse...