hydrogen peroxide for discoloured Tamagotchi?

[twinkle_twin22]

Hi, I recently got a used pink Tamagotchi P's and it has some yellow discolouration. I tried the method using benzoyl peroxide cream and it helped a little but there is still some yellow. I have seen videos of people restoring games consoles with hydrogen peroxide cream. Before I try I wanted to ask, has anyone else tried it? Is it safe or would it be to harsh for the plastic? I really do not want to damage my Tamagotchi.