With so many razors affected I wonder: are you sure there isn't a set of scales in your collection that has celluloid rot? The corrosive fumes will attack any nearby razor.
This was my first thought when reading this thread. I am new to straights, so I can not give any long term storage advice. I have however thought about what I will use when the time comes that it is necessary. At the moment I'm leaning towards using a generous coat of petroleum jelly & storing the blades with celluloid scales seperate from the razors with natural scales.

If there is any reason I should avoid this method PLEASE let me know, PLEASE!

Regards
Louis.