I have 1986 Baja Sunsport the fiberglass decking has some weak spots down the middle. My first question is how do I go about repairing this? My second question is do you think it is just deck rot, foam rot or one or the other or both. I understand we will not know for sure until we have cut into the decking but was just wondering if anyone else has had this problem. If it is both how do you replace the foam in it as well?