Originally Posted by Spieluhr
not a bad idea for wheels. But I would NEVER use that. The risk of the soap splashing up onto the paint is too high and because dishwashing soap is so hard and abrasive it will ruin your paint. It would be a great idea if you were to take off each wheel and wash them away from the car.
Dishwashing liquid will dull the clear coat but will not affect the paint. I actually used to use it to wash my old jetta and the paint was never harmed. I'm not advising that you use it on your car but it's affects are less impactful than you stated. If you get a couple drops on your car, it's not a big deal.
I do use palmolive on my wheels now though and it works great b/c of the degreaser. However, if you do it, be careful not to select a liquid that contains bleach.