Hello I have been reading your posts with the cans. I have used Oxalic acid powder to soak beer cans that you cant read anything through the rust. It will at least bring out the color under the rust. Wont make them perfect but will be able to ID them. 1 cup acid in gallon of hot water. Check them after a day or two and it should magically appear through the rust. We were able to get it through a chemical supply company but you had to by a bulk quantity I think 5 gallon bucket became quite expensive. Hope this helps in your quest for the missing can in your collection.
Found this pic on amazon $ 120 for the bucket. a search also showed that Walmart has a 2 lb bag for about $14 They both label it as a rust remover.
Found this pic on amazon $ 120 for the bucket. a search also showed that Walmart has a 2 lb bag for about $14 They both label it as a rust remover.