While not "authentic" Dymo-labeled, I'm happy with how mine turned out. Clear, easy to read and doesn't look like it was made with pilfered library equipment. I screen-printed mine onto folded aluminum plates I painted satin black.
As for someone stealing my car and knowing what the switches do, I'm not terribly worried. Most people can't seem to even figure out how to open the door. Knowing which button actually STARTS the car gets more interesting.
Mark