bcgreen- I`m not a Dawn-hater, but what about Dawn would make it suitable for wheels? Adding "soda" to make it more aggressive? And what kind of soda? Blasting Soda? Baking Soda? Washing Soda? (Those are three possible Sodas that come immediately to mind..)
Most wheels are powdercoated these days, and powdercoating is generally pretty tough stuff, so I doubt such a mix would do real damage, but I don`t get this one. Hey, if it`s just Intellectual Curiosity, then OK, cool! Far be it from me to be a wet blanket and stifle scientific inquiry! But unless wheels are LSPed in some way (in which case Carwash Shampoo is sufficient IME) I`d expect them to need a genuine Wheel Cleaner for good results (which is why I don`t reach for Degreasers to clean wheels either).