No idea, its just known as "wheel acid"
I had a friend who was a valeter a few years back and its the same as the stuff he used to use. Ive tried allsorts since, including the Autoglym stuff and acid free cleaners, but nothing works as well as this stuff!
I found it after I had trouble getting the wheels clean on the race car - the type of race pad, plus the heat the brakes get to, ment the dust really got baked on to te wheels - this is the only stuff Ive found that really shifts it all
Phil - if you can get it down my road, Ill do them