B-Pilar Trim Cleaning/Detailing

[F2502017]

My B-Pilar trim has this weird staining. I thought I could just put some black plastic trim dressing on it, but that does nothing. Any ideas? Anyone else notice this on theirs? Tried cleaning with a degreaser and glass cleaner than reapplying and no difference. Will likely have to replace or paint them unless I can find a solution that works.

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[Copperhorse73]

Try 303 plastic/vinyl, I used it on this piece with great results