I received an old cutting board from my mother who asked me to engrave the board with something special. My wife found a picture of her house just after it was built. So I took that image and created a "Chateau Charbonneau" board. My test burn was perfect... and my real burn on the board was perfect. That is where the trouble started. Once it was complete, I took the board and gave it a light sanding to remove some burn marks and then polished it up with my board wax.
Little did I think that a light sanding would remove the "patina". I thought it was dirty and was cleaning it up.
We are in the process of trying to re-age the board.
Lesson learned for the future.