As my mother used to tell me, sometimes you can get away with things (repairs, flaws) if "they don't show." When my favorite black sweatshirt got white blotches on the sleeves, I colored them in with a black permanent marker. The match isn't perfect, but I always scrunch up the sleeves, anyway, so it doesn't show. And I have just added lots of more life to an old favorite.
One other one I might mention to you that if you are wearing white shoes and they become scuffed, get some White-out that is used for typing errors and put it on the scuff marks. Should cover them nicely.
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