A good way to get clear skin for your modeling audition is to first determine the type of skin that you have. If your skin is dry or oily, you will need different products to maintain the health of your skin. Once you have determined the type of skin that you have, consult with a beauty specialist at a makeup counter or dermatologist's office to get the right products for your skin. If modeling is going to be a career for you, you will need to invest in maintaining your skin's health. Drink plenty of water, take vitamins and don't smoke or expose your skin to sun and you will also help protect it.