Update on wheel No. 3:
I've not been really bothered with progressing this over the past 2 or 3 weeks, so this wheel has been in the electrolysis bath all that time - I did turn the wheel over in the bath a couple of times though.
It sat there quite happily, the sacrificial anode gets quite gunged up very quickly, so it draws only a fraction of an amp from the battery charger, which was running cold, so very little power consumption.
I took the wheel out today - this is all that's left of the anode!
It's only made of scrap steel, so no problem, but I'll have to weld on another piece for the next time I use this system!
Boy, this system does seem to work well, and really cheap too!
After all that time, not only had it shifted
all the rust (it did that in a day or two) but it's also actually started to lift a lot of the paint too, which is handy - I wasn't expecting that! It hasn't removed
all the paint by any means, but it all seems to have gone loose and flaky, so will probably be much easier to fully strip now.
This is the wheel after I'd taken it out and washed it down with a hose, then dried it:
(Sorry about wobbly image - hand shake, I was hungry!)
Pretty good I think you'll agree. I really rate this system, it's childishly easy to set up and incredibly cheap to do, less than a quid for the crystals (I still have enough from one packet to do several more bath-loads, and even one bath can be re-used for ages) and overall I reckon it's more thorough than the Deox-C crystals method, although I'd still use Deox-C for small parts, as I did on some small mounting brackets on another car the other day.
The wheel still needs quite a bit of cleaning up, particularly the removal of the rest of the old paint, but I think this will be quite easy now (relatively speaking) and so I'll do this as soon as I have some time & inclination - watch this space!
Cheers all - have a happy Christmas!

Some people are like slinkies - they serve no useful purpose, but they still bring a smile to your face when you throw them downstairs.