Shaman I used plywood but as far as paint it was and identical process for me. One other thing I did was once completed I sprayed the very bottom edges from below with some flex seal.
My first blind was OSB and it began swelling and separating from clinging water droplets. I figured sealing that edge couldn't hurt.
Yeah, I've got a bunch of OSB sitting in the shed that I'm eventually going to use for a blind. I'm hesitating. On the one hand, I've seen OSB shacks that have been up 20 years. I've seen others that were falling apart in 5.
Edges are important. I normally use 3/8" plywood. That's what most of the packing crates were made of as well. I spend a good long time rolling primer and one coat of finish on before I start cutting. Then I prime and finish the edges when its all assembled and roll on the 2nd coat.
My magnus opus was Midway Phoenix, my "luxury box."
Midway Phoenix -- A Deer Shack is BornIn its early years, it sported a mural on the exterior. I resorted to a flat green later. The orange paint kept fading out.