I had to store an antique cast-iron cookstove and was told to cover the surface with Vaseline to prevent rust. Well, it really did work in most places, but after 10 years in a dusty outbuilding it's a sticky mess. I'm preparing to sell the stove and am wondering how to clean off the grease without damaging the nice black patina underneath. I haven't tried anything yet; maybe hot soapy water will do it?? Also, for final polishing, should I use something like the Rutland stove polish/blacking mentioned in other posts?