Be careful not to overclean with the rust erasers (or with any abrasive really); they come in different gradations of coarseness, and while they feel soft and springy like a pencil eraser, they do remove steel over time.
BTW by sheer coincidence rapier's delight just happened to post another cleaning video about a kaskara just yesterday:
https://www.youtube.com/watch?v=lua4UIGvknI