Yes, thank you, ppine, my husband gave me the same lecture when he found out.Keep an eye on your stuff and maintain it. Do something at the first sign of rust. It is one of the benefits of a dry climate- little if any rust or mildew.
We do not live in a dry climate. You practically have to check your knife daily, just because of the humidity. But I promise to be much more diligent from now on!
Now for the news. I tried the onion thing. I just stuck the blade of my knife in the onion and let it sit over night. The bad news is that the onion left some black gunk on parts of the blade. the good news is that it really did get rid of the rust, and the black stuff came off with a little scrubbing.
Mind you I didn't have rust so bad it was pitted or anything, just a little surface rust that wouldn't come off. So this myth is "confirmed."