I generaly wave at other people in Stovebolts if I'm driving something that they are likely to understand is also a Stovebolt.
But anymore I rarely wave at my wife or most friends because by the time I recognize who it is its too late to be seen. My aging eyes can't tell one green Subaru from the eight or ten others I see everyday.
I recognize a Stovebolt in plenty of time most days. But coming home tonight I failed to notice and wave at the guy who sold me the truck I was driving. Old age... He was driving his slammed '72 Chevy that I should see a mile away!