Coming from U.S. Naval Aviation, rags used to be issued by the bail. A burlap bail compromised of cut up old clothes. You would go down to the bottom of "the boat" get a bail, then lug it back up to your shop, somewhere near the flight deck. In addition to wiping up oil and hyd. fluids and scrubbing down / cleaning the aircraft during and after wash jobs, they would be used in tons of other ways. Twisted or braided into rope small ropes to tie off whatever. Wrapped around the old canvas firehoses that we'd use for those wash jobs, to stop leaks or stem the flow from a crappy brass union Etc... Etc... Etc... These were unaccounted for, or just thrown away when we were finished with them. Years later, after an engine or two had been F. O. D'd out from someone inadvertently leaving an unaccounted rag in or near the intake, the Navy stopped this and began issuing rags from the tool room, which would need to be turned back in before you were allowed turn over the shop to the next shift. Anyway after transferring to a new squadron that was stationed on a small island out in the Pacific, they ran out of red rags. Supply ordered replacements, but what came in where the best tan cotton rags I'd ever seen. They were being thrown away by the tool room out there. Some after barely being used. I was able to get a bunch of them that I still have to this day. That being said, I still get and use old towels and t-shirts etc.. When my wife throws them out. Old toothbrushes and kitchen sink scrubbing sponges too for that matter. Cj