Recently acquired an 18 ft krugerrbrand baymaster, the previous owner had 6” marine speakers mounted in the the two storage/seats up front. Down below facing the center console. I don’t want to put new ones in and would like to patch up the holes. I need those boxes for storage and it doesn’t make much sense to mount speakers there anyway. What is the best way to patch this? It seems like it’s just a thin layer of fiberglass. I have plenty of electrical and mechanical experience but never messed with Fiberglass before. I’m confident in my ability to learn but need a push in the right direction to get started.
