Now c'mon Jordan, you're confusing people now.
Most of the snow foams on sale from reputable manufacturers will be near ph neutral or slightly alkaline and should not damage the car in any way, they are purely used as a way of loosening dirt and best used on a protected car as most of them are wax safe.
TFR should always be diluted but the local car wash places tend to use it to strong or even neat but it is used on very dirty cars to help loosen the dirt on un protected cars as the dirt sticks and gets more embedded.
Generally though on a protected car, snow foam isnt needed, a good pressure washer rinse will do the same in most cases!