OK, all this talk about washing cars and finally a nice weekend with some time got me out there washing the D4 with Autogylm for the first time. In comparison to Meguiars I found Autoglym to be not as viscous, so I used a little more, and the suds and liquid was not as slippery. Seeing as the point of the suds is lubrication, this might not be as good?
Anyway, the performance of the cleaning was absolutely fine, with no additional effort needed. Long term I think I will stick to Meguiars NXT though.
As for foam cannons - I bought one and if you have enough people to work with you, it is a lot faster to do it that way, and easier to get suds everywhere you need it. I think I use more product though.

