I have a Gong Special that had obvious previous rust semi-circles about 3/8" in diameter on both sides of the edge. They were polished off before I bought the razor on ebay. A discoloration remained, showing shadows of the rust spots.

After obtaining the razor, I polished the blade and honed it.

Now I notice that the spots re-rust again even without use. I have sanded the spots off several times, but rust keeps reappearing. None of the other razors I store in the same way rust at all.

Any suggestions as to how to exorcise the Rust Demon that's taken over this blade?