[RidgeRunner]

Regular pressure treated plywood is a NO-NO. It will be so wet you will never have proper adhesion. Most treated plywood is Southern Yellow Pine which is not the best plywood to use in the first place. Pressure Treated Marine Plywood that has been Kiln Dried After Treatment is dry and will work. Marine Plywood is FIR and has a better grade of interior plies.(Less Voids) It is available with or without the pressure treatment.
All of the plywood of BC grade or better has a finish too smooth for my liking. I like to rough them up before laminating with resin. I do not know if the glue is different from regular exterior grade plywood. Most all of the delamination issues come into play due to lack of proper glue in the manufacture of the plywood. There are numerous brands and species. I wouldn't use a cabinet grade plywood for core on a boat. I would make certain that whatever I used it had Exterior Grade Glue. Look for the X on the end of the grade. (CDX, BCX, etc.) If you don't want to invest in the Marine Grade Plywood, at least go with Exterior Grade Fir. Okume is very nice but expensive. Happy hunting..