For those who have aluminum boats, I'm looking for advice. I'm wanting to have a few deck lids (built like the top of a shoe box) built to cover the holds on my boat. They will be a piece of aluminum sheet metal with the edges bent at 90 degrees to form a small 1.5" lip around the permiteter of the hatch. The lids will be 38" wide by 60" long, so I'm thinking 3/16" aluminum plate would be adequate, but kind of doubt 1/8" would be strong enough to be constantly walked on. A little bit of flex is acceptable, but not to where it feels "weak". Any advice or suggestions would be appreciated. I was looking at Seawolf boat's website, and they use 3/16" aluminum on their decks.