Hi. I am a pianist not a technician....
I own a Yamaha CX7 at home. I live in Thailand where the weather is pretty humid. I had one a dehumidifier in my piano room but recently it stopped working. And the string get rusty while I'm trying to get a replacement...
This piano is VERY expensive... And my heart broke when I saw the rust on it... I also attached photos.
It is very strange that it get rusty mainly in the middle register of the piano...I have no idea why.
Here are some photos
Here are some of questions I have.
1. Is it normal that piano string get rusty? Those pianos in the concert hall where the humidity is perfectly regulated don't and will never have a rusty at all... Or it is pretty normal to have rusty string we just have to clean it?
2. The technician I knew, (the best one in Bangkok) said once it get rusty, it will get better once we clean it BUT it never be the same...is that true? So I meant that the my grand piano will NEVER be 100% the same once it get rusty?.... I know that piano needs a lot of care ...but I didn't realize that it is SOO fragile.
3.Except cleaning the rust out and replace a broken dehumidifier, what else should I do?
4. Any idea why the rust is only on the middle register?