I recently read this tip: use a matte, unscented antiperspirant on your face. I've only tried it once, under my eyes and only in MI heat, so not sure how it would hold up in WDW.

I never look like I'm wearing make up either, even though I am. But, I go light on make up, especially in the heat.

I usually pull my hair back too. It's thin and shoulder length and just works better that way in the heat.