A "permanent" fix is to use a 2 part clear urethane. It builds a thicker film that is UV resistant and does not need anything for many years. You just sand it smooth and apply, you can apply all your coats in one (maybe two) days
There are several brand of two part urethanes clear coats for wood, we have a 20% off the EMC ST clear right now for forum memebers.
here it is on JFK's old boat
