To give that all black & new look? 


Look into a high quality plastic trim wash and conditioner like this one:
https://swissvax.us/collections/other-care-products/products/plastic-care-kit-gloss-matte
There are plastic refreshers, that work short-term. Long-term you would have to paint them.
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2Opinion
There's some stuff called Mother's Back To Black trim and plastic restorer
There's a product called trim black it's made for plastic
Thank you !
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