Has anyone used finger jointed marine plywood. I found a site in which you can buy 3,4,6,12mm finger jointed marine plywood. It is a little more that buying the 4 x 8 sheets and doing a scarf joint, but given the free shipping and the lack of labor, it really seems like a good buy.
The aluminum is not that thick, maybe 0.5mm. So far it has been great to work with. I will post some pics of the build when I get it on the strongback again.
SignPly Single-sided, painted aluminum over furniture grade exterior plywood core
Benefits
Impact resistant, colorfast surface is warranted not to fade, flake or peel. Average outdoor life expectancy is 5 to 7 years if properly edge sealed.
Construction
SignPly is composed of painted aluminum face on premium furniture-grade, exterior plywood. Factory-baked polyester paint on the finished side with a mill-finished aluminum backer to provide balance and prevent warping.