I know this forum section is for "auto detailing 101" but I figured this would be a good place to ask this question because you guys are the ones using coatings and know how they perform etc. I'm looking to put a coating on the outside and inside of my boat hulls gel coat smooth finish and I was wondering if there are any products out there that have been tested on gel coat yet. I know Marine31 has their captains coating but I was looking at other companies like carpro, optimum, gyeon as well as others and was wondering if their stuff would work on gel coat? Having a coating that would last longer than a wax or sealant against the beating of the suns UV rays, salt, dirty brown river water, blood, etc would be insane. Also are there any coatings that are flexible enough for soft vinyl cushions?

thanks
Mickey