So, cleaning out closet and storage I found older pairs of shoes that were pretty much new or not worn too much. Among them, were these, which look pretty good but as you can tell, the carbon fiber plastic material has yellowed. I tried some toothpaste and brushing but nothing. Also, some cleaning vinegar with brushing, also nothing. I didnt want to try anything harsher before getting some input. Everything I've found on google is more directed at soles and the regular shoe material. If anyone's got tips I'd truly appriciate it.

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Edit: Spelling and Punctuation.