Well, most of CV & brake lines are pretty tough to withstand beatings, so I wouldn't worry too much about damaging your rubber or plastic materials, as long as you hose them down with lots of water as soon as you spray those products. I use Meguiar's all wheel cleaner, it says it's safe for all kinds of wheels and you're supposed to hose it down 15 seconds after you spray their product. I'd be more careful with rims rubbing on any hoses in the wells though. Try using like Simple Green, they're great on stains & grease for serious cleaning and their also environment friendly.(so they say)