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Are nickel silver,sure you can use them.

Should you see evidence of cell rot on your other razors,than all are doomed,you do not want to start a Pandemic.
The Hirlau razor conservatory in Florida has a razor crematorium,The conservator...

As above, you other razors will most likly be okay,quaranteen the offender,oil the others and keep an eye on them.Also as above,soak the scales in acetone and remove the hardware for future use.