Cleaning cast iron with electrolysis part 3

This is part of a series on seasoning cast iron cookware.

SAFETY WARNING: This process (electrolysis of water) generates extremely flammable hydrogen gas. Use adequate ventilation, keep away from flame, spark, children, and idiots. There is also a possibility of electrical shock. Read all safety warnings and take appropriate precautions or do not attempt.

At 180 minutes, current had dropped to ~5A (down for 10A @ 135 minutes). The charger was turned off and the skillet was removed for inspection.
The layer of black iron oxide & old seasoning or whatever it was came off easily. I rubbed some off with my hand without really trying and scrubbed a bit more off with steel wool. Underneath was dark gray metal.

There was a "shadow" of one of the plastic pieces I used as a stand off. I guess the plastic blocked that part too well.

Also, the underside of the pan, which is flat on the bottom of the tub and opposite the anode, saw little change.

The mesh anode has started to disintegrate. The parts that were close to the cathode (skillet) crumble when I touch them. The parts that were out of the water are unaffected. There was, as before, a thick brown froth that was mostly just dirty bubbles but had some solid bits in it. The solid bits may have been from crumbling wire on the mesh.

I have reassembled the apparatus with the plastic stand off pieces in different places so that I can get rid of the shadow. Also, the inside of the skillet isn't completely clean yet so it needs a bit more, but the progress thus far is significant.

I'll have to start over for the underside, I guess.