I am restoring the cabinet of an old "Wilhelm Spaethe Gera" piano and even the ivory keyboard is very dirty; one of the owners, being very sensitive, thought it was a good idea to write the notes on the keys with a blue marker. I did a test with 1200 and 2000 grit sandpaper and then polishing compound, it works well, the key becomes clean and shiny again.
However, I noticed that some of the front plates are unglued or almost so, so I need to consolidate all of them. What is the suitable glue for this job?
The former owner, besides being insensitive, was also quite ignorant since he wrote the note C on the B key, B on A, and so on. Liszt's Second Hungarian Rhapsody played on that piano would have been performed in B# minor, which is a hypothetical key and homophonous to C minor.
Alright..... You polished it well. To glue them, you need a special glue for ivory plates. You cannot use contact cement, which darkens and becomes transparent over time, changing the color of the ivory
