I've bought this to take care of her car. The Purple Haze is listed as being suitable for dark cars so seeing as her car is black I thought it would do the trick. I bought the trial pot for now to give it a go.
Have to say, the best buy recently has been a tube of Meguiars Scratch X 2.0. Bloody amazing!
Matt suggested Billberry Wheel Cleaner back last year so I bought some and have now run out. The Chemical Guys Maxi Suds II is also a great product. I've been pondering the machine polisher for years now. I've been in touch with Matt about these a few times and i've been watching the Meguiars videos on-line to see how you use it.
This might be the start of a new career!