A long sleeved shirt makes excellent sunscreen. As does an umbrella.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.
I have found that if I eat clean with lots of fats, and take cod liver oil I don't burn 1/2 as bad as I used to. I personally just make sure I up my CLO, and after a couple of hours in the sun cover up, or go inside for a bit. That worked for me last year when I went all over Europe without any sunscreen, and didn't get a burn once even in Italy, and southern France.