Advice on repair to SnowEx 575. Have four 575's and they are all now fitted with the plastic spinners replacing the (preferred for me) metal spinners of old. The fins on the spinners are beginning to get torn up with holes and gashes in them. What do y'all do when this happens and gets to the point they are no longer doing the job? I know there must be someone here that has some ideas (short of replacement) for a quick repair of the fins with epoxy, plastic, and/or coated metal pieces of sheet metal? If there are no durable fixes then I can have them replaced when they get too bad, not a problem. Thanking in advance.