Clavis 165- Thank you... I just need to tidy up the engine bay a bit too it seems busy! If your refering to Green treat plywood that is commonly available at home improvement stores, that is completely different than Marine grade plywood.... The chemicals in Greentreated will eat through just about every metal except for stainless. I would finish the marine grade in Spar Varnish so the metal wouldnt be touching the plywood either way, but thank you again for the input!