I removed my boat from winter storage, and the whole thing looked clean and in good shape except for one door, the large access one behind the helm which doubles as a walk through door to the bow (part# 1753958). It has completely yellowed! I'm guessing it's from prolonged exposure to UV, then storage in the dark all winter, kind of like what happens with cheap old ABS plastics, but I was surprised this would happen on fiberglass (I think it's fiberglass). It's still functional, just an eyesore! Anyone know of any tricks to remove the yellow and restore back to the original white/off-white color? I was thinking about just buying a new door, but haven't been able to find this part for sale anywhere.