Formula One car bargeboard.
https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...515#post205238
https://www.homemadetools.net/forum/...960#post137592
https://www.homemadetools.net/forum/...484#post139233
https://www.homemadetools.net/forum/...770#post143958
https://www.homemadetools.net/forum/...004#post137757