This is so simple I still can't believe it works - but it does!! Buy a bottle of Coke Cola (the real brand not a substitute), get a can that will fit the tools and just let the tool soak in the liquid for a couple of hours. Then rinse off and be amazed. I've done this with can openers, my fishing filet knife, etc. Good luck. azatz@funtravels.com
Every time I clean my mirrors, they end up having tons of streaks and almost look worse than before I started. What could I use to clean them that won't leave streaks...
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Try WD 40
I usually sand it until most of it is off. This article basically does the same thing, probably in a better way, but with salt & lemon juice
https://www.todayshomeowner.com/video/how-to-remove-rust-from-tools-naturally/
Good luck!
For rusty tools I sell on Ebay I use the electrolysis system. Espacially heavy rusted tools.
http://www.instructables.com/id/Electrolytic-Rust-Removal-aka-Magic/
https://www.google.com/search?q=remove+rust+electrolysis&tbm=isch&tbo=u&source=univ&sa=X&sqi=2&ved=0ahUKEwiAiPXE3pDVAhUBQCYKHT8LAy4QsAQIjQE&biw=1016&bih=642&dpr=1
WD40 will do the trick!
This is so simple I still can't believe it works - but it does!! Buy a bottle of Coke Cola (the real brand not a substitute), get a can that will fit the tools and just let the tool soak in the liquid for a couple of hours. Then rinse off and be amazed. I've done this with can openers, my fishing filet knife, etc. Good luck. azatz@funtravels.com