Wax/Polish a new boat

It keeps the UV off the GRP which helps stop it yellowing, as already said it helps keep the dirt off.

On the other hand it's darned hard work.
 
I polish my boat each spring, usually with a combined wax/polish. Last year, for the first time I also used a separate wax treatment. The difference was startling. Not only was the hull much shinier but it kept the shine all season and is far less yellowed. Despite having 60ft of hull to do I will repeat the treatment this year. Incidentally, the hard work was in the polishing. The wax went on quite easily.
 
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