Hard plastic and soft plastic mobile phone cases, hard plastic with soft cloth and toothpaste can easily remove scratches, soft plastic is a bit troublesome, shallow scratches can be used. Only the phone case with deep scratches can be replaced. First, wipe the scratches with a soft cloth and toothpaste until they are invisible. There is only one way to get rid of the whitening of the soft plastic surface after wiping. This is what I summed up through many experiments, and the internet said it was impossible. This method is soft.