Stephen W wrote:
It could be failing clear coat from sun damage or maybe repainted and clear coated from backing into something. Pull a tailight or tag light and look for repaint clues. My 2006 Sea Breeze appears to have clear coat over the painted areas, but I don't think it has clear coat on the gelcoat.
If the previous owner or dealer used Poli-Glow, it's a major PITA to remove and restore. I kept a sailboat in a marina slip for 20 years and several owners used Poli-Glow to get fading fiberglass to shine to help sell the boat. One clue I remember is that Polo-Glow starts to flake off and turns light yellow if not restored annually. Let us know what you find out.
This is kind of like a light tan. When you run your finger across the surface you can barely feel a line to the light tan, meaning it does have a thickness. I'm just trying to figure out what it is before I take the next step. It is interesting in that it's only on the back piece. No issues like that on the sides and front.
Al