Took my red-tagged crankshaft to a second shop. They say the corrosion isn't an issue, where it is located. It's not on a load bearing area of the crank. It may be polished a little, but it will never be pretty. It will all be nitrided, and according to them, the corroded area will be every bit as hard as the rest. Once the engine is assembled, it isn't going to show anyway. Aircraft Specialties and Services in Tulsa is the shop which red-tagged it, and Aircraft Engine & Accessories Co. in Dallas is the shop which isn't worried about it. Both good shops with differing approaches. Pretty vs. practical. It does pay to get a second opinion, right Dan? Other issues may crop up, between now and a yellow tag, but at least I have a crankshaft. Tom Robinson