I don't know why I'm surprised by anything I find on the internet but I was surprised to find this.
Way back in 1971, when I was in seminary school, no, I mean when I was at Drexel University, I had a co-op job for 6 months in a chemical plant (I was studying to be a chemical engineer). There was another Drexel student there with me. We were pretty much out of place, two long-haired hippie kids in a hard-had environment. The other guy stenciled "Urban Spaceman" on his hard-hat and I put "Space Cowboy" on mine.