This image shows high visibility paint applied to a Red Bull Formula 1 car during 2025 testing in Bahrain. The paint is applied to the cars in areas where engineers want to learn more about how the air flows around components, then the cars are driven at race speed during testing. By inspecting how the paint is spread along the bodywork, engineers can determine how the aerodynamics actually behave in race-like conditions.

Image Credit: Peter Fox for Getty Images:

Cropped to show detail by Motor Sport Magazine: https://www.motorsportmagazine.com/articles/single-seaters/f1/flow-vis-paint-why-do-f1-teams-use-it-during-pre-season-testing/