did that ply years ago Chris, in my neighbors most excellent wood shop
tj - I bolted most all of the planks, and if you finish all 6 sides before assembly, then do an undercoat once it's together it
might work OK sheltered in a panel - with the pickup exposed in my wet climate, there's been some cupping and shifting after about 15 years of daily hard use, it needs a good sanding and repaint .... when I get a round tuit

Bill