For sun protection, I can heartily recommend a wide-brimmed hat, and use of ordinary zinc oxide ointment (cheap, in any drugstore) on the nose, like the lifeguards of old used to use. It is virtually opaque to sunlight. I also wear (always) paddling gloves in summer, made from cheap gardening gloves with the fingers cut short, to protect the backs of my hands from the sun. But my best defense is a Level Six men's coastal long sleeve loose fit top, in white (to keep cool, and reflect the most light). This is made from 80% poly and 20% elastane, blocks UV like crazy, and, best of all, seems to baffle New Jersey's killer greenhead flies and all other sorts of biting insects.
Thus equipped, I don't use any sunscreen at all, and don't need any DEET either.