So the sunscreens in moisturizers that I use has only small amount of ZO, 3%. I usually use it first thing in the morning. I would like to put some sunscreen on before driving home in the afternoon. I don't want to put on moisturizer over my makeup, and I don't like the off the shelve sprays because they feel oily. I was thinking if I put 5% ZO and 5% TiO each (or 10% if 5% is not enough) in witchhazel as a spray, would it work as a sunscreen? I use Thayers Witch Hazel Alcohol-Free Rose w/Aloe Vera. I know it would not be water proof. I just need something to top off my sunscreen in the afternoon.