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Wow! Please add more close-ups of the "chair (beach) rail," esp. the "mermaid."
You can achieve the same ends by rolling the egg on a counter with gentle pressure. Makes a million tiny cracks and the shell slips off easily; plus, there's no additional jar or shaking needed.
While it would be insightly, I've read that gluing egg cartons will muffle noise and basically soundproof a room. Sounds like an extra layer of sheetrock would be necessary over the cartons for aesthetics.