See pictures of my post #11 in this thread years ago. This Sauer was so rust covered you could not read any lettering on it or see case colors. WD-40 and a Frontier pad did the trick in a couple hours! I still have the gun and it still looks every bit as good as it did after cleaning it up back then.
http://parkerguns.org/forums/showthr...er+Pads&page=2