Use some 1x10 for the outer collard. I sandwiched the foam paneling; one to make it lighter and also for some extra insulation.
Some stain, a couple of stainless bolts, chrome shank and a perlick tap and it is ready to go.
I will primarily use it for a fermentation chamber/ conditioner, but because it will sit in the garage I figured I added an extra tap. Maybe down the road a couple of extra taps won't hurt. Still need to add a collard on the bottom and some trimming for the banged up corners and it will be completed.