To get a darker colour on you waterline, I suggest warming the pencil up by rubbing it on the back of your hand.
Re. how long the pencil lasts, I've noticed the following:
- It lasts all day on the waterline, it is creamy when you apply it but it sticks around for ages, doesn't smudge or anything.
- If you have brown eyes, it's a really good work-safe colour to use as from a distance, it looks brown but it accentuates your eyes
- I have been using this on a weekly basis for more than a year and I've only had to sharpen it very recently