Craig Calfee told me (in the late '90s) that a 'nude' cf frame was susceptible to the UV concerns. That a well painted frame was immune to UV. And that clearcoat they applied at the factory was somewhere in between, tending much much closer to paint. I chose paint with clearcoat at BB and chainstays. His experienced opinion was based on about 15 years exclusively building high-end cf bikes; and before that building CF small boats&parts and kayaks.

1" threaded, Campy 9 triple - just as the world was shifting to 1 1/8" threadless with 10 speed in 2000. It got upgraded over time + factory repainted once

Are the epoxies of today UV resistant? Seems likely, but IDK. Probably not Phoenix, AZ UV proof but Seattle is perhaps gentler. So many variables.

I also chose to paint the top portion of a cf fork on another build.



Nude cf with weaved top layer was a 'thing' for a while with weight-weenies and carbonaholics, bitd. maybe still is?