What to do about Rust like residue on hinges?

Hello all,
I did the crock-pot overnight to clean the several layers of paint on the hinges from my kitchen cabinets. the paint it come off wonderfully well.. however, next day noticed a dust like residue of looks like rust on hinges and screws.
this does dust off.... BUT what do I do before using these hinges to put the cabinets doors back on.. do I need to use a sealer ?? or is dusting them enough...
Help please. thanks all.

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