[Pappy Smear]

I don't want to damage my car with a bumper sticker. However my vanity license plate says

AUH2O64

Kudos to the first high school junior in chemistry class that can figure it out. That was a hint by the way.

[Ronin]

Goldwater in '64. And I wasn't old enough to vote, then.

[Slyfox]

AU H2O 64

Goldwater '64

I took chemistry in high school does that count?

[NotJustAnotherPrettyFace]

It's: Goldwater 64.

I got A's and A+'s in high school chemistry. :-)