I found a badly rusted padlock a few weeks ago in the backyard and I decided to try electrolysis on it just to see how much rust I could get off of it. I took an elongated plastic container, a piece of rebar, and my battery charger to use for the process. I got some washing soda from Amazon (can’t find it around here) and mixed maybe a cup and a half of it with the water. I set the charger to 2 amps and it sat there for a couple of days (except when I was work yesterday). This was really more about getting experience with electrolysis than an actual restore. The lock is in pretty rough shape.