Good luck for you Oneitis!
Just one comment though: take it easy with the make up:
- I don't know anything about make up, but having loads of make up and sweating because of physical exercise seems to me a recipe for disaster.
- The more make up you put, the bigger the mistakes you can make. Keep it light so that they notice YOU and not your make up, for the wrong reasons.
- Don't get them used to seeing you with lots of make up, otherwise you won't be able to tone it down later. Better to start with a level you would be comfortably having on a routine basis.
Let us know how it went!