I've had some rubber-neckers also; but many more when I was using the black corroplast wheel covers. I see some rear wheel skirts in my near future.
[edit] I originally tried to find some thin garage opener metal strips, but Lowes and Home Depot only seem to carry this larger 1 1/4" stuff with holes stamped in it. That said, the holes are the right size for some plastic automotive fasteners from Autozone. Jam it in the hole, then push the center pin in and it holds good!