While the majority of the original questions have been answered over this thread's year+ lifetime, a few things I've found of late make things easier and more bearable in the make-up department.
First, if your hair is short, Joico has a product called 'Spikerz,' which is a colored hair glue. As with other hair glues, it's extremely resilient and tough. Unlike putting make-up in your hair (Including Mehron and Ben Nye 'Hair Whites'), it won't flake when the occasional projectile, weapon, or tree branch hits it. This comes in white, and lasts quite a while. For darker hair, I suggest mixing the application with the aforementioned Hair White product from your favorite manufacturer. (Amazon has it located
here.)
Second, for arms and hands, there's a new-ish combination of items that has made it much easier for higher temperature events that can allow lighter items to be worn atop clothing. No doubt, most have used Under Armor products to keep heat down and the like, but with the increased onset of Compression and Running sleeves, I've had the opportunity to test out a couple over a recent long event in rather ... warm temperatures (California's Long Event in July, specifically).
I tried out the
McDavid Compression Arm Sleeve and the
Nike Pro Basketball Player's Sleeve. Overall, I preferred the Nike Pro Sleeve better. It provided longer length (And thus, coverage) without being overly tight. Differences are pretty minimal, the McDavid product is more a glossy black while the Nike sleeve is a flat tone, but has subtle designs on it. Easily overlooked, overall, though. One mistake not to make with either of these, regardless of your preference, is to not leave them on overnight. Nothing overly bad, just a very... weird feeling in the morning. Like leaving socks that are a little too small on over night. Just weird.
And, combine either of these with something like
these gloves (And a couple safety pins in discrete locations), and you've got a complete arm without a bit of make-up on them to clean up later. I paired the combination up with Under Armour's sleeveless compression shirt, and garb over the top. Excepting the height of long term combat, temperatures didn't get too unbearable.
As far as make-up goes, you'll take the
Mehron Charred Ash specialty powder from my cold, dead hands. Combine that with
Barrier Spray and everthing else is a cinch afterwards.