Ammonia and cold tap water. A buddy degreased a heavily oil soaked stock with this solution in under an hour. The amount of oil on top of the water was unreal and had I not seen it myself I would not have believed it. More effective than acetone. He said he got this from one of the old Brownells y Kinks books.
I have one that is just causing me major issues, this looks like a great idea. How does it work? Do you submerge the stock? Float it? Ammonia to water concentration? Any insight would be great!