This is my style.
You’re in control, and can apply the level of meticulousness you desire (or until your quarters run out). You don’t have to buy any solvent equipment or soaps.
Just make sure to use the pressure wand to wash out the foam brush before use. You don’t want to be dragging someone else’s road grime all over your finish.
To do it right, air dry it by driving home and then apply a good handwax. You’ll still need to hit a tunnel once in a while to get that bottom coat, though your ride will know where your heart really is.