blade rust

We have recently acquired a Bright OTF cryostat along with four non-disposable
blades.  The blades have rust spots on them that need to be removed.  The blades
may even need to be sharpened?  Does anyone have any advice on how I could
remove the rust (a technique or reagent) myself without having to send the
blades to a commercial vendor?

Thanks in advance!!


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