I used marine paint for the inside and outside of my stand. Same sort of idea built with 2x4's and plywood. I didn't use a primer but looking back i definitely would if I was to do it again, the wood sucked up quite a bit of paint and I found that it takes a bit longer to dry as well.
I got the paint from general paint, I just asked the lady at home depot and since they don't carry any she recommended a store for me. Hope this helps.
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