Both our rigs with gel coat showed some fading at 4-5 year mark in the Florida Sun. The Surveyor started losing some graphics at around 5-6 years and you could see the difference in the gel coat where the stickers had protected it.
The current rig is painted and at 4 years looks indistinguishable from new. It's got something like 8 coats of BASF on it. Ask a lot of questions about the painting process and materials. As someone suggested, if it's done post assembly to a completed unit there likely will be some deficits from that method.