Good evening! I am replacing the two pieces of marine plywood that hold the batteries (2 pieces 24 x 15 x 1/2 inch). I am not sure what type of plywood to use...it's seems like there are 6 choices of different types of marine plywood. Any ideas? I plan on painting these prior to install with the slate gray that Sea Ray used. Does anyone suggest expoxying these before painting. Any help is appreciated!