Yes. If you're working a job around food or chemicals, wear a cap. Don't let an employer tell you that they require their employees to shave for some weird reason not involving either of the former. I was at a job interview where the lady interviewing me said the manager required all the employees to be clean-shaven always, because he was a conservative and a Christian. Since this job was the last stop on a long list of interviews I intentionally sabotaged the interview from that point. Now granted I'm not a Christian, but from what I recall, Jesus had a beard, so what's more Christian than a trimmed stache/goatie? I never grow out a full "ZZ Top", always stay trimmed above the lip (hate getting food stuck in my hair) and so I'm always neat and washed. I personally think I look more suspicious fully shaved, like HRG from Heroes. Never trust a man who's that neat always because he'll be the one carrying a bag n tag kit in his black Polynesian leather suitcase.