I'm surprised, I haven't seen this before, and I looked for quite a while when I previously posted about Sonia Delaunay in order to make as complete and thorough a post as possible. But it's a pleasant surprise to find other designs she made for car paint schemes

https://www.design-is-fine.org/post/104254804694/delaunay-belleville-portfolio-with-automotive-art#notes
For previous coverage of her amazing designs: http://justacarguy.blogspot.com/search/label/Sonia%20Delaunay