I tell you that vinegar is the only way to fly...
Quit doing psedoresearch on You tube, spring $4 for a gallon of the cheapest vinegar Wallyworld has, put the rusty clod in a plastic foot tub from back when Great aunt Maybell was in the hospital and you could not throw away a $20 piece of plastic.
Fill up the tub with the vinegar (outside unless you like you house to smell like rusty pickels), enough to cover the rust.
Check it after 12 hours, flip it. then at 24 hours check it again.
90% of the things I did were done at this point. (you can get a tooth brush to make the rust fall off the crevaces), but most of the rust will just fall off.
In all seriousness, this is REALLY EASY.
Back when I restored furniture for a living, I did alot of stuff on the side like this to sell as well...
No electricity required, no waiting for a chemical reaction between H2O and the sugars of the mollases.
KC
Oh yeah, the vinegar is reusable, just strain off the rusty goop.