A few days ago I decided to do an experiment to see what worked better for rust removal - Evapo-Rust or apple cider vinegar. A month ago or so I recovered an old gate hinge that was equally rusted on both ends. I filled one soup can with the Evapo-Rust and the other with the apple cider vinegar. Then I placed one end of the hinge in each can and left it for 3 days. I pulled it out, gave each side 5 strokes with a metal brush and rinsed.
I was surprised that the AC vinegar appears to have worked better. In the photo, the Evapo-rust side is on the left, vinegar on the right.
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