I use a UV protectant on mine (http://www.303products.com/)
A thorough cleaning and application of something (like wax), at the beginning of the season,
to cut down the UV degradation is necessary or yes, over time, fibers will start showing through.
Wont say it'll be "ruined" if you don't cover, you can always sand and recoat the surface with epoxy,
but a little preventative maintenance will go a long way.
I'd re-apply again during the season, about once every 2 to 3 months.
Side note...if anyone figures out how to hoist a comp-tip cover up the mast ??? please share
