I get asked what “without wax” means quite often.
During the Renaissance, marble was incredibly expensive and even more difficult to carve. Average sculptors would inevitably make mistakes. They would cover up these mistakes with wax, and dust marble overtop. Thus, any sculpture “sine cera,” or without wax, would be one that was pure, without faults, without deception — or sincere.
I unabashedly stole the concept from a Dan Brown novel. I read Digital Fortress as a kid, and I loved it. I’ve signed all my personal correspondences “without wax” since.