Hi Gang
I am new to the forum . I saw a old listing about Rust on
Piano strings. There was a suggestion of putting WD40 on the
bass strings to stop rust . after I had a gigill , It was time to get serious about the topic .
The only way to stop rust is by have Non rusting Strings
put on the piano in the first place. As far as I know I am the only producer of Non rusting piano Bass Strings . We call them "LUMA non rusting Strings" .

Steve Marx
Australian Piano and Pianola Factory