I looked at Tom B’s cockpit table extension which is really a beautiful piece of craftmanship, not to forget the other work he has done on retro-fitting the plastic pieces with wood.
Our approach is a little different based on our experience with the wooden table extension we have for the galley table which is rarely used and I’m forever
worried about scratching it while in storage where ever there is space that day!!
So, for the 3 or 4 times a year that we might need a larger cockpit table, we’ve come up with extension made out of pressed board that I had lying around the shop. I feel that a few coats of white primer and white exterior paint will keep it useable for many years as long as it doesn’t sit in pools of water. Also won’t worry about scratches where ever I store it.