This is the last prepared blank duck egg in my collection: now it is the “scribble egg” or the “climbing egg”.
I do have one more blank egg: it is an ostrich egg! It needs some prep work before I can draw on it. It seems to have a fairly glossy coating that I probably have to sand before I work on it. Also I want to think about how to display it, and decide whether to fill the conspicuous holes used to empty it.