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I'm not sure if there is another thread like this, but I don't feel like looking.

I like to paint my nails, but when I do, the finger nail gets all soft, and flakes, and even chips off. I'm not sure if it's my nails, or the polish. I usually buy NYC because it's cheep, or Wet and Wild.
If it's ruining my nails, I don't want to use it.
Is there any nail polish that won't damage my nails as much? Links and stores gladdly appriciated.