Apply enough to evenly cover the face and neck. The amount is usually about a teaspoon.
Yes, but sunscreen formulated for the face is generally lighter and less likely to clog pores or irritate sensitive skin.
Yes. It's important to reapply for prolonged sun exposure, even over makeup. Many people use SPF mists or powders over makeup.
Many modern sunscreens are lightweight, non-comedogenic, and suitable for acne-prone or sensitive skin.
Yes. UV rays can penetrate clouds and windows, so daily use is recommended.