I have a triple foam system. I don’t see any extra value in it. It was sold to me as “The customer will see the color change and use it longer!” That has not been my experience. What I see is the customer uses the foam brush as long as it takes to wash the car.
In addition, my system always starts on the first color. The timer switches to the second color after a set amount of time. When the customer stops using foam brush it always restarts on the first color. My
soap use is first color goes fast, second color gets some use, third color lasts forever.
I wouldn’t do tri color foam brush again.