In one training class we had a requirement that we mark our 2 pair of shoes "I" and "II".
We were to wear I-s one day and II-s the next and so on. Meantime the pair we weren't wearing was to be shined. All of us wore our I-s, and maintained them minimally. We kept our II-s shined in case of an inspection.
At a surprise inspection the one guy in the barracks who had done it right, followed the book, was wearing his II-s, had his I-s shined. That was the correct timing. The instructor, who realized it was all BS and hadn't kept correct, or any, track, gave him hell and extra duty. The guy grumbled to us, but took it all well, and went on to be a good officer.