Stan, I just cleaned Jaynes car and my Mums too. At this time of year I do a two stage foam wash that I am trying to get right!
I just use megs shampoo plus (usually 6 squirts) topped up with warm water. This will not strip any wax and saves buying snowfoam too. The foam looks superb and does what it's meant to!
I apply via lavor pressure washer and polished bliss foam gun.