I've twice spotted a Steel Grey coupe on I-675S going to WPAFB Area B; looked clean, "GYMRAT" tags, (enthusiastically) driven by a 40s-ish gentleman. Both times passed me through traffic; I tried to get his attention to compliment his choice of vehicle, but alas could not.
Also saw my Z's twin on Vance AFB when I was there in '07: stock-looking Silver Grey 6MT sedan (though I don't have the usual lip spoiler).
If you see a Silver Gray sedan in the Dayton area, wave!