At Lowes, they have some stuff, I think put out by WD40, that you either use full strengthy or dilute. It notes that it gets rid of rust. You soak it, as to time, according to how bad the rust is. Rinse off & dry. I bought some about 1.5 years ago to use it on tools. I have been seriously thinking of using it on some of my non stainless steel hooks to see if it will bring them back to life. As long as the barb has not deteriorated, they should turn out OK. It was about $26 a gallon in the Tool section here in Bryan at Lowes.