I originally found thorough cleaning of the white bonnet stripes on my '02 MCS to be a losing battle even with the use of Zaino products. One day out of frustration I tried using Simple Green and to my amazement.....it did the trick! Stripes with water stains and other marks can be incredibly frustrating and I thought this tidbit might of help to someone.

 

I use simply green to wash my white wheels. I use a very weak mix, and it makes them look like new. I only do this once or twice a year. Keeping them waxed and clean cuts down on needing to do a full wash.