I like others have more mechanical exp. than body, my gelcoat bottom is old(1980) and is full of those little stress cracks ,as I call them, I can see them , but can bairly feel them. like little spider cracks I've heard them called. should I just clean and wax ,or paint? boat is 100% trailered, don't want to do that yearly bottom paint . is there a one time paint?? don't know what all that ablative non-ablative , two part... that's all greek to me. any advice would be greatly appreciated.