I did this on one of the front hubs( i took the disc and caliper off and electrolysed it with the hub. ) It seemd to work very well, howver the pics i have dont show it well. Also now the hub i electrolysed seems to spin mor freely) It doesnt become shiney or clean, but it removes any rust and leaves a surface thats relatively easy to clean(i pressure washed it). I would do it for the rest of my parts, but it just takes too long tbh and i cant be bothered as its just mor work.
the one on the left still looks very rusted but it is nothing compared to the one on the right