if that was the case then why was it only in these small select trim pieces ??To me, in both instances, I'd say it's some sort of chemical from road spray that's reacting with the plastic and causing discoloration. Who knows what kinds of substances are leaking from the millions of vehicles that travel every day.
or in case of the grill why only in that small area & not over the vast area of plastic on the whole front end ??
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