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I'll admit that I ddin't watch much of the video. I have used this method (washing soda / sodium bicarbonate, a big bucket, steel electrodes, and an old high-capacity battery charger) and it worked well. A couple of tips:
- Brush/scrape as much rust off as you can.
- Thoroughly degrease / pressure wash and dry the parts.
- I've used both multiple pieces of rebar and steel wire mesh for electrodes. It was most effective when I lined a circular bucket with wire mesh and put the part in the center of the bucket so it was equidistant from all sides.
- Watch the amperage on the batter charger; surface area and electrolyte conductivity determines current draw.
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