almost free rust removal using battery charger and washing soda?

I tried the Molassis method, it works, barely. I tried de-rusting some spring hangers, i left them in for two weeks, it took a little rust off, but I would guestimate only about 1/3 of it. I decided I could not wait anymore, so I dunked it in Evaporust, it only took 3 hours to finish it off. I next tried it on an old rusty, chrome wheel cap, it worked a lot better on chromed or lightly rusted parts. Oh, by the way, did I mention that the molassis stuff smelly like a hundred dirty whores in my garage! :vom: