Good point about the oil thing. I know that the people at MAC will use baby oil (or something like that) to take those long wear lipsticks off. It would make sense to avoid oily foods, or else it will break down the lip colur, and off it will come!
The only thing I miss with MAC's long wear lip colours is a lip liner. I love lining my lips, and then filling in with a colour. With MAC, there is just an applicater tip. You have to be really careful not to make a mistake when doing the lip outline. Does anyone know of any long wear lip liners? I would love to get one to go with my new red lipstick. I am thinking of using a thin lip brush, dipping it in the long wear product, and then lining my lips this way first.