I may have asked this before, but I don't recall the answer. Anyway, I'm thinking ahead to my spring detail for my black 09 Mustang. The car is a garage queen, never sees rain (unless by accident), doesn't get left out in the hot sun unless it's in a car show. My planned process is the usual: clay, SSR 2.5, Black Hole, EX-P, & a few layers of Natty's Blue. But, I'm thinking about deleting the Ex-P. As the summer goes on I usually throw a coat of Blue on every few weeks to keep the finish fresh. So, do I really need the added longevity of sealant? Does it add anything, appearance-wise?