I have herd mr clean magic erasers will eventually turn your stuff white...Also, you can use an eraser to get of wax in textured places or places that are hard to reach

 

I use this stuff called colinite (not sure on the spelling). It was recommended to me by a professional auto detailer, and it is the best wax I've ever used. Very easy on/off application as well. After about 5 months water still beads up and rolls right off the paint. It will show white on the plastic though, need to be careful there.