So my dad wants me to make a couple of replacement bumpers for his boat trailer. Basically they are pieces of plywood covered in outdoor carpet. He's insisting that they be made from "marine grade plywood", in spite of my suspicion that he has no idea what "marine grade" even means or if the originals were even made therefrom. (from it?)
IAE, I'm tempted to use good old pressure treated ply but for the fact that I've heard the new stuff corodes metal screws and this gets bolted to metal. Any thoughts?