16. They’re all the same. They all get the job done.
All sunscreens are not the same. For instance, many so-called water-resistant lotions or creams do not retain their full SPF factor once you get them wet. Also, the true SPF factor offered by a product may be slightly less than that stated on the label.
17. My hair will protect my scalp.
Thick hair protects better than thin hair and dark hair protects better than light hair. However, hair does not completely protect your scalp. So, wear a hat.