Tadhg wrote:
Another alternative... Not my Facetube (best I could find with a quick Google), but it's an image from a mag, anyway. The claim (from Clarkson) is that F1 teams are now painting their cars with ultraviolet paint before practice sessions, then analyzing the paint (under black lights) when they get back, to see what it looks like. Might not work on a Mini (no, I'm not suggesting ultraviolet paint, just the effect), and might be difficult to do, but it looks cool here...
Id say this is more likely to fine tune any aero, as it would be a pretty good way to determine high drag spots on the car, due to lateral winds and track racing. The stuff a wind tunnel cant do.