Consider a ceramic based sealant, like Sonax Polymer Netshield. I switched to that product on my boat last season and there is a huge improvement in water beading longevity. Safe for gel coat. Easy to apply.
We use a Lucas product on our 16 Eagle for about a year, and a micro fiber mop.Keeps me off the ladder, purchased at wall mart 6 bucks and some change.Good stuff!