There are many ways to restore rusted tools. The easiest and quickest (in my opinion) way is using a wire wheel. This, however, is the quickest way to get kicked out of any antique tool forum. It leaves little scratch marks. Another way is using electrolysis. It uses electricity to pass a current through a bucket of liquid and cause a reaction to remove the rust (its a lot more in depth, but that is the plain and simple explanation). I have not yet experimented with this way.
Today I’m using a method in which you use white vinegar, easily found at a grocery store, to let your tools soak in. The amount of time it soaks varies greatly on the condition and thickness of metal. Check out the video for more information and see how I use it to restore an old saw passed down to me from my grandfather.