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Lemme see if I remember what Neil Miller said......

Cellulose Acetate....Good.
Cellulose Nitrate....Bad.

At least I think that is how it went. When making them, there were frequent fires and...

Any chemicals/solvents such as evaporust and alcohol are NOT good for any plastics.
They are likely melting, literally.
I would say to let them dry good, open and in open air, after a light...