I use 303 protectant. Apply everytime you wash and eventually it will slowly turn back to a darker colour. Helps if you use it from new because the protectant has UV blockers in it which slows down the fading. On my 2 cars, the one with 303 applied since new in 2004 still has black trim, while the gf's car which only received protectant once every year has gray/light gray trim!
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