We needed a compost bin to replace the pile forming in a corner of the yard. We referred to it as "The Buffet" to reflect how much our new puppy enjoyed digging through the scraps.
I I substituted cedar fencing to top the bin instead of the plastic sheeting. I just liked the way it looked and it was more cost effective. The most difficult part of the project really is wrangling the chicken wire. It's sharp!
I used treated lumber and a waterproofing deck stain. This is not for an edibles garden. I'm just using the soil to fill in low spots around the yard. If I was building it for a veggie garden I would have used all cedar wood with no stain or a natural shellac.