Adams Mega Foam 

Just a short video demonstrating Adams Mega Foam Shampoo.
It's quite a pricey shampoo but it is concentrated so in my opinion it works out cheaper than Adams Car Shampoo. I have both products and once on the panel they perform exactly the same apart from Mega Foam having a slightly thicker foam that stays a little longer. (There's not much in it though.)
Quantity used was 30ml Mega Foam and 320ml Water in the MTM PF22 with a standard 1.25mm orifice.
Pressure washer is a Kranzle K1152. (040 orifice in the trigger)
Camera is a GoPro Hero 9.