This piano was made is 1982 so that’s about how much dust you can collect in a domestic situation over a few decades.
We managed to save this piano with a chronically cracked soundboard. This piano was so badly cracked that it made playing the instrument a nonstarter for the owner. Unfortunately the piano had great sentimental value which made this repair even more essential. Happily we can report that in just a couple of hours we successfully restored the instrument to its former glory. One VERY happy customer indeed.