I've got a question for you guys who spend a lot of your day behind the wheel of a truck. How do you keep your left arm from getting more tan than your right arm? I spend a good portion of my workdays driving. My left arm looks like a California surfer's arm, and my right arm looks like it belongs to some geek living in is momma's basement playing video games and trolling the Internet. (Although, he'd be a very handsome and muscular geek, I must say.) I'm putting SPF 30 on my left arm only, but it's still way darker. Whadda you guyses do?