How to reapply sunscreen while wearing makeup (from 15 Minute Beauty Fanatic)

If you're going to be in the sun for an hour or more, and you're using a chemical sunscreen, even in the fall/winter, you'll have to reapply if you want it to keep working properly. Here's how.

But don't use milk of magnesia as primer. Also your sunscreen-containing makeup probably isn't giving you much protection, so don't rely on that.