this seems to be a common problem among all types of hondas specifically those in red. ive hear 4th gens 5th gens here who have the same problem. Seems to happen only on plastic trims too (side mirros, spoiler, etc.)
Point is, paint fades, but why does red show more paint fade than other colors im not sure. Paint fading is caused by daily sun exposure and industrial fallouts in the air. Climate and temperature probably plays a role too.
How to fix it? From previous desicussions i dont think there is a real way of fixing it. you might want to do a search to make sure too