I mostly wash residential driveways and patios. These usually are not covered in grease like commercial driveways are.
I’m currently using just a simple solution of bleach (or pool shock) mixed with a little bit of detergent (either laundry soap or dish soap to give it some foam). Pre-soak with the down streamer wide open for approx 15-20 mins (requires 2-3 re-applications to keep it wet if it’s a hot day).
I then come in with my flat surface cleaner running 25 deg 015 tips (tri-armed model).