Actually, there have been at least three threads on this; but the
Trim looks like crap thread is the definitive one. Yours, I believe, has gone south later than any other I've heard of: the other cases seem to be early ones. Well, S**T Son! Time to wrap them. I wouldn't put up with cracking drip rails twice. Maybe the entire roof wrapped in Black? Looks best on a sunroof, of course. There must be a wrap that approximates the Silky Silver closely enough. Alternatively, ceramic coat the black, unpainted replacement strips? A few options there. The other thing is, park out of the sun as much as possible: I think that this crazing happens because of weathering.