milo I had to really work IronX on the wheel surface sometimes as it didn't lift some of the crap on the wheel corners. Wolfs does seem a stronger based chemical overall. Will be ordering the 5ltr version and job done.
Matt What brush have you got? I can highly recommend one of these: http://www.cleanyourcar.co.uk/wheels-and-tyres/ez-detail-brush/prod_480.html