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As wind tunnel testing becomes more prevalent in order to achieve the best-possible aero, you might want to check out a material that is used by some Formula One engineers to create such things as the front nose of their cars for wind tunnel testing, a polyamide composite that can be processed with rapid prototyping equipment, Windform XT from C.R.P. Technology (www.crptechnology.com), which is based in Modena, Italy. In the case of the F1 nose, the issue is assuring that there is dimensional accuracy, detail definition, stiffness, and vibration resistance. It is opaque black colored. Another project that the material was used for: the headlight washer cover flap for the Lamborghini Gallardo.