I finally had the opportunity to try ONR after several "buy" recommendations from Chris and other members from the forum.
I first washed the interlagos blue M3, and used an entire 5 gallon bucket of ONR to complete the task. The car had been rained on this week, and had been driven about 75 miles and accumulated a typical build-up of road grime. The current paint protection is Kalles AIO topped by their sealant.
To be quite honest, I was not blown away by the end results. The car was clean, however, the results were not better than a standard 2 bucket wash with a hose by my side. I know its only a wash product, however, I've bought in line and sinker into the technology behind the OPT line, and was likely expecting a more significant / measurable difference. As well, given that I was ever conscious of potentially damaging the paint, starting doubting the benefits of using ONR altogether. To finish today's wash'n'wax, I used the Optimum Wax as my LSP, and was very impressed with the end results with this product.
Later in the afternoon, I wanted to try ONR again, and decided to tackle my black mustang cobra (my dd), which was driven approx 300 miles this past week, and has TW ICE sealant as the LSP(btw - this will be my first paint correction target once my GG polisher shows up this week). The car was slightly dirtier than the Bimmer, therefore decided to prepare a pre-soak ONR solution using a very scientific 1 capful of ONR to a 25 ounce spray bottle. I sprayed the entire car with my pre-soak, and then proceeded to wash the car. What a completely different result! The ONR wash was very easy, and I was quite impressed with the result. Even my neighbor commented that the cobra looked better than the M3.
I'm curious as to my different results - does the base layers of sealant/wax make a difference? Does ONR work better on darker colors? Was the pre-soak that critical to the success of the product? Perhaps my technique improved? Was Dr. David a mustang guy, and had a hatred of BMWs?
I'm curious for feedback, so thanks in advance.