There's not much to say about painting the stairs except that if you're doing it on your day off, it goes well with a beer. And it looks a lot better when it's done.
I should emphasize that these open stairs had to be painted top and bottom, inside and out. I was only on the third tread when I started getting paint on my hands. By the fifth, I also had paint on my feet. Eventually, working on the bottoms and insides the paint started getting in my hair. Someone should remind me next time that happens, to clean up before the paint dries.
In my own defense, I was really focused on trying to avoid falling down the stairs and taking the paint bucket with me. And at that, I succeeded.