Tom,
I recall my parent's white oak sofa and armchairs that were waxed with Johnsons for many years. The wax buildup would turn a milky white when any water would be allowed to contact it. Other than that, I don't know, but I suspect it may just be a characteristic of waxes. Personally, I don't wax my guns, with the one exception of one I sold, which I waxed before displaying it for sale. I used pure carnuba and it really looked good.