But I managed to find a fairly simple image of a Volkswagen Beetle. And even if I say so myself! I think this stamp turned out pretty good
Again, at the top is the printed image from internet, then there is a traced version on parchment paper and then the final result stamped in red on a post-it note
I have an image of a convertible 1969 Camaro, but it has a bit too many details. I'll have to simplify it quite a lot before I can carve it out.