Cabelas finally tracked down my '95 SRC and I have it home now. Nice shape, about 40% receiver finish, 90% barrel blue and no rust or pitting. It looks like the previous owner gave it a daily douche with oil of some type, there's a hardened coating on the rear half of the receiver and the internals are coated as well. I couldn't take it so it's in pieces now with the parts soaking in a can of WD-40 hoping to dissolve the crust. Is there anything that works well? I don't want to brush it and remove the patina, just get it clean.