Here is an image of the mclaren with flow vis on it, it is a really really intriguing image showing some really detailed flow patterns on the body and floor of the car. You can also really notice the flow down washing over the body and then converging in the coke bottle area and going to the rear diffuser it is really facinating. You can also see how the rear suspension arms shape the air flow and direct it up and into a key region between the upper and lower wish bone, very cool. Too bad images like these are hard to come by and some teams like merc use uv flow vis so it is pretty much invisible.