I use sunscreen all the time now, I thought it was a hoax when it first came out, till I tried it.

One time I went fishing in Algonquin Park with 3 friends (2 canoes), it was very sunny and hot and I even got a slight sunburn through my cotton t-shirt.

My 2 other partners were in an aluminum canoe, wearing just bathing suits with no sunscreen. They spent the day drinking rum and trolling for lake trout, by the end of the afternoon they were extremely sunburn, but to drunk to feel it. The next morning was really painful for them; sunburnt and hungover.

Mike