Probably aluminum. Did you try a magnet yet? Aluminum flashing is also
available. They may look like galvanized steel because of their age.

Rather than metal, you can coat some marine plywood with a heavy varnish-type
product. There are several out there that will seal it very well.

Dan


TC wrote:
14' Aluminum boat

I'm missing the center bench seat. The other two seats have plywood
wrapped with a type of sheet metal that looks galvanized. I tried using
flashing from Lowes but that does not work. What is this metal and
where can I get it?