Reality check: every time you ride up the lift, your ski bases are bathed in UV light. It reflects off the snow. Bluebird spring days are the worst because of the higher sun angle. Basic rule of thumb: if you are accumulating a sun burn, your bases are getting their fair share too. So, I'd think a few hours of UV exposure to cure a Phantom application really is just a drop in the bucket as far as ski bases are concerned.
Truth. Anyway I was trying humor. Should have used one of these!