I am decking a 16' starcraft over aluminum framing and have a question in plywood. I intend to use 3/4 plywood as i have in the past. However, do I need to use marine plywood or would a good birch plywood do the trick? I plan on sealing it with several coats of oil primer before installing and i am going to rivet it down and put matting over it instead of carpet. This is going to be a saltwater boat and will have lots of dead fish on the decls from spearfishing.