So we're breaking ground for our coop this week, using a pre-existing building on a concrete slab. It's a slant roof building with large windows. The inside of this building has exposed studs, so husband and I agreed it would be nice/cleaner look to cover the studs. He chose OSB... but now I have read how hard this stuff is to paint. I am considering filling the seams with drywall mud and perhaps coating near the bottom with mud to prevent poo-splash from warping the OSB. But apparently this stuff is a lot of work to sand/paint/finish and I won't get the smooth wall look I wanted. Basically-- all of the work I have to put into it to make it look nice... will probably exceed the cost of getting better wall material in the first place....ugh.... why?? I was really hoping for a ritzy interior and am now wondering if it wouldn't hurt to wallpaper over the OSB in places instead- with wallpaper found at thrift stores. Now I read wallpaper won't even help it. Now that we have the OSB sitting in the shed, ready to go up this week... any quick fix ideas to achieve swanky coop interior? Most primers and paints boast a one-application ability. Can I find anything (exterior, oil based?) thick enough for a one coat application over OSB? Are both sides of OSB chemically sealed? Or perhaps I can avoid sanding by putting the sealed side facing the other way? Also, we're using the hex chicken netting for the interior of the coop- to divide the room into two coops for flock separation/brooding/breeding. And planning on using a heavier gauge wire like hardware cloth for the runs. However, it being so expensive, I am wondering if I can combine fencing- having say- 3ft tall hardware cloth along the bottom of the entire run, and a wire with larger openings for the higher sides and roof of the run. We saw many different options at Lowes last night, one called a containment fence- showing a dog, another for keeping rabbits out of the garden, etc. They all seemed to be the same strength as hardware cloth but with larger openings. My goal is to have an impenetrable coop and yard for show-birds (Black sumatra).