I don't see how we can if we put sunblock on in the morning and then put makeup ontop of it.
I had Clarins spf 15 on yesterday and sat outside for a bit (an hour maybe in total) and my face was pink this morning!
I am going to get spf 30 - but how long does it last? If I do my face at 8am - is it still going to be working at the heat of the day when I walk the dog at 2pm??