Painting a bathtub is easier than you think. I had painted the inside of my old claw foot tub a couple years ago using tub and sink paint. That stuff is smelly! It's held up great,
though. Recently, I painted the outside with Annie Sloan Chalk Paint in Old White. I also painted a fleur de lis and stripe to give it a bit more character. U used Annie Sloan's Paris Grey paint. You can see the full project on my blog.