Need some advice. Decals been on boat for about two years. Boat is fighting lady yellow and kept on the trailer not covered or in a garage in eastern north carolina. Boat is waxed with 3m product two or three times a year. I know that there has been some fading on the hull and need to know what can be done once the decals are off so you want see the outline of the decal or letters? Any help would be great or a product to use.