a handful of contemporary automotive logos

All of these are made of plastic, none are very old. They've almost all been picked up from streets and curbs while walking the dogs or whatnot, presumably leftovers from other people's traffic altercations. The Lexus set is the exception, they were saved from a loose trunk lid a friend obtained from a scrapyard to salvage/re-use its taillight fixtures to repair somebody else's car.

EDIT the next day: I just realized that I actually forgot to show my FAVORITE-IST of modern car emblems -- the FORD blue oval seen in new pic1, as it currently resides decorating the corner of my office TV set. It is also an exception to the 'curb saved' source of the others, as it was purposefully obtained especially for me from a scrapyard. (by the same friend that got the Lexus trunk lid, at the same time)