Peelin' Paint, Strippin' Walls
I did some tests on the paint on my walls and I couldn't find any lead paint. that's the good news. The bad news is that it all has to be removed because underneath all the paint, is poorly installed wallpaper so you can see the seams through the paint on every wall. Those are the walls that were underneath the wood paneling so they didn't get covered with a thick coat of hallucinogenic murals.
I've started the slow process of stripping the wallpaper . Here is a photo of about how much you can strip in a half hour. This is serious work for someone with OCD. It's like picking at peeling sunburn. But once you get into it, it's hard to stop.
Initially I started messing with the areas of thicker paint where there crazy tenants had painted flowers next to the stairs. After trying to sand it and use paint stripper on it, it turns out that the paint is so thick that you can scrape it off with a stiff 1.5" scraper. The paint chips off down to the wallpaper backing. Then you soak the paper with some water in a spray bottle and scrape again. It's pretty easy because the plaster wall beneath it is so hard.