I certainly wouldn't peg that as OSB from your picture Karliejaye.
It takes a lot of primer and paint to get that smooth look, not to mention the smell, LOL. I like white because it's so bright and open, but then I think of all the dirt...and mud, we have lots of mud here, LOL.
I always wanted to do a fancy smancy tack room with wainscoting, framed pictures, the whole works basically, even though it serves no purpose.
I figure if I'm paying for it why not? Of course, to afford that I'll have to buy a tiny little garden shed and decorate the inside the way I want, but it'll be the prettiest and classiest little garden shed/ tack room you've ever seen...might even hang a chandelier. Who cares if it's only 4 feet by 4 feet, LOL. I'm nuts and I know it. XD