Let me guess, it's a black car?
Either way, it's likely just the ABS plastic getting old and causes the clearcoat/paint to go with it or possibly the paint color. My brothers 01 GP has the exact same issue yet my dark blue 2000 GT does not (and no, they have not been repainted and it has lived 85% outside for 24 years and 500K+ miles.)
Could be the jsut clearcoat failing on it and making them cloudy as well. I'm not expert on the paint but have seen it multiple times. Might be able to buff it back out with compound and polish.
