Corrosion X is what I used to use but I ran out of it and it's Very Expensive to buy in Canada now.I have never tried this but could you take a swivel that had some corrosion/salt deposits and put it in CLR or Tarn-X? Wonder if that would rejuvenate them...
I actually have some but forgot about it. I use the Corrosion X HD for my boat trailer. Never thought about the regular for my gear...bought it down east from Fishntech. Real nice guy in Quebec.Corrosion X is what I used to use but I ran out of it and it's Very Expensive to buy in Canada now.
I've seen great results on heavily rusted tools using Vinegar and Salt.