There are definitely spots, you can see her searching when she picks up the eggs.
I might try to sand down some eggs myself. However, to make the middle egg is going to be hard: Those spots need to be on exact opposite sides of each other!
I wondered if maybe she had glued something on the egg rather than sanded it down, but there is nothing visible like that either...
by Daniel Simu, in response to this post 2015-12-04 09:41:44