I am using OSB for the walls on my coop. For the floor I have used Hardiebacker board for a support base and used OSB to create replacable floor pans to go over the Hardiebacker that can be pulled in and out for cleaning. The OSB used has been given 3+ coats of paint and primer and all edges will be caulkes and sealed. I suppose my question is how did painted OSB hold up for you all? Any tips?