Magnetic Sign & Logo Design Ideas - Diets has made lots of car sign designs for many popular diet and weight loss programs. Newspaper and radio ads are very expensive.Car magnets are inexpensive and effective. Reach potential clients everywhere you drive with our signs.Advertise your supplements or excercise program with big beautiful full color signs on your vehicle. We have lots of diet related clipart that can be added to your signs. We also have lots of pre-made designs for popular programs that you can easily edit to create your own unique design with just a few clicks of the mouse using our online design software.