Seeing alot of good reviews on the jescar powerlock plus but they've all been on cars. Anybody used it or another sealant on gelcoat? Or do I just need to break down and have it ceramic coated?

I've used the Menzerna (now branded Jescar) Powerlock for about 5 years now and it's great stuff. Goes on easy, then comes off even easier. It lasts longer than conventional Carnauba waxes, but ceramic coatings will definitely last longer.