Yep, hell hath no fury like acne-prone skin after a thick coating of zinc oxide. Your pores look at SPF like you might look at a big vat of Crisco: You can't seriously be considering putting that on, right? It's a cruel cosmic joke of damned if you do, and damned if you don't. Apply sunscreen and wait for the pimples to start cropping up, or ditch it and risk melanoma and wrinkles. The choice on that one is pretty clear for us — so we had resigned ourselves to a summer full of blemishes.