So every raver needs glowing/UV reactive ...well, everything. As time has progressed, there are more and more products out there to help with that.
Before it became so popular, you could buy glow in the dark and UV reactive clothing at chain stores everywhere. Now that "do-it-yourself" has become even more popular, you can buy spray to add to your clothing. Some kits even come with stencils which are nice. There is spray, markers, and bottle that can be applied with a brush or sponge.
More and more make up companies are producing products that glow as well. It is becoming a more popular trend even though you have to be under black lights or in complete darkness to see it.
Brands/Websites that sell glow in the dark/UV reactive cosmetics:
-Wolfe Face Art and FX
-Make Up Forever
Of course this is not a complete list and if you do an Internet search you can find pretty much what ever you are looking for.
You can even use accessories such as wigs, clip in hair extensions, eye lashes, stickers to your face or body, or anything you can think of.