YES! PaT I N A.Bay it is not rust, it is patina.
Windows are a good idea. You don't need them for the same reason that I do, keeping out winter winds, but I am sure that you get some heavy winds at times and that could help keep the dust out. I would recommend plexiglass, if you can get it, but DEFINITELY go with vinyl so that you never have to paint it.They would be dust covered and filthy in no time. Nope.
I've been thinking of maybe 2 windows. It will get all wired up for LED lights (the whole barn) and two ceiling fans in the feed and tack room.
He sure is! Prince is so funny!