I've been going to Aruba for 9 years now. My family is from Sicily and Malta. I find SPF 8 to be just fine and after 3 or 4 days I usually go with nothing.

No doubt this is an exception. If I do get any sort of burning (which is usually lite as it is rare) I use a quality after-sun and take plenty of vitamins, especially the oil-based vits (A,D,E,K)