I don't put sunscreen on my forehead. Between sunglasses and my helmet, the skin there is not exposed to the sun.

Sometimes I put chapstick above and around my eyes to keep sweat from running into them. However the sweat will run around and down the edge of the chapstick, so you have to apply it in a large arc all the way from one side of the eye to the other, otherwise it will get into the corners of your eyes.