Think I only really need to to apply Snowfoam but I'd have to wash it on the street and think the foam may be a bit too much.
Hmm, as it drips off the car it does create a fair bit of foam that needs to drain away and if your aim isn't great you can end up snow foaming other things, front of my house is spotless
I suppose it depends on the street and your neighbours? If you think it would be ok? Obvious but don't snow foam on a very windy day!