Griot's
I've used the car wash, speed shine, wheel spray without issue.
http://www.griotsgarage.com
However, I do think that you can find other products that are just as good yet cheaper.
For instance, you may have noticed the cult-like following Zaino has around these forums!
That said, I use Griot's speed shine, clay bar, wax and polish on my C32!
My neighbor solved same issue with his Black 911.
And this is viewing under fluorescent lighting, the most critical condition.
I swear by Griots!
FYI-I really like the Griot's Microfiber drying towels.



