I wouldnt even consider using the same tools to clean wheels as you do to clean the car, thats suicide!Excellent guide.
Although i wouldnt start doing the alloys before the body though because Wheels are a lot dirtier than the body works. So if you are using thesame mitt/sponge it will pick up all the crap in the alloy then through your car paint.
What i do is i start from the top section working my way down. Also, i actually use three buckets instead of two.
The first bucket is clean water to soak the car and soften all the crap in there for a couple of mins.. The second is the Soapy Solution for scrubbing.. and Finally the Third ( and sometimes the fourth ) clean water for the final wash.
I have had my Lambswool mit for at least a year now. You HAVE to rinse them through and hang them to dry after each wash, or they will rot. Mine is good as new tbh.I wouldnt even consider using the same tools to clean wheels as you do to clean the car, thats suicide!
There's nothing wrong with certain sponges, Zymol do one which is awesome and i believe Dodo have a few samples out there which seem to be doing well, im currently trialling one of the B&Q grout sponges - seems ok as long as its got a layer of foam to help lubricate the paint (i always wash with a layer of foam on anyway)
Problem i find with lambswool mitts is that they rot within a few months.