Key Removal Demonstration
A few people have asked me how the keys were removed in my last video, so here’s another video showing it up closer. This method generally isn’t used as it only works with certain types of keytops. The edge of the key is placed on a hard surface, downward pressure is applied, and pop! The keytop flies off! This older type of keytop is slightly flexible, and the glue holding it is usually brittle due to age, so the top usually pops right off.
— Piano Technician Jonathan Knudsen