It took me forever to decided how to decorate the edge of the plate and in the end I settled on doing this simple design with a black Sharpie.
I stuck a plate hanger on the back of the plate. I use these a lot for my paintings done on canvas panels that I don't want to frame.
I remembered reading somewhere that you have to condition the chalkboard paint by going over it completely with chalk and then rubbing it off, so I did that, and then it was finished.
This would be great for hanging in a kitchen and writing a menu, or a shopping list, or just fun messages.