Crankshaft Journals

When we removed the front block and 2 stuck pistons, I looked inside the crankcase and saw a shiny surface. I thought 'Oh this is good' but it turns out that what I saw was the back side of the insert bearing. It was siezed and stuck to the crankshaft. The bearing side was black and motled. I worried about the main bearings but after all the stuck cylinders were removed the crankshaft turned. I used a 4.5 inch angle grinder with a wire wheel to clean up the hardened journal surfaces. Some journals were discolored but they cleaned up and look like they will work. Where the connecting rod bolted to the journal there are 2 small lines etched in each journal. I believe from acid in the oil. I felt it with my fingers and it felt rough. I used a ball grinding stone on a cordless drill and polished the rough spots. My friend Bob told me that he had sucessfully rebuilt John Deere tractors with etch lines in the journals.