Using a cosmetic that has SPF is sufficient protection.

Any exposed part of your body can get skin cancer.  That includes your scalp, lips, hands, and feet.  Yes, a cosmetic with SPF can help to protect your face, but you also need UVA/UVB protection which is typically only found in cosmetics that include a specific barrier ingredient.  You would still need to re-apply that cosmetic completely over your face with a certain frequency to maintain the effective sun protection barrier.  A better recommendation is to use a sun block and re-apply it per the directions.  Adding the use of a mineral face powder with sun block can be a great way to reduce shine and maintain face skin protection during the daylight hours, in addition to head to toe use of a skin block.