drexl said:What? Like an actual ink pen? Or are you talking about a pencil liner instead of liquid liner?
Here's a crazy trick I picked up from a couple of goths back in the day, use hairspray. Yup, that's right, hairspray. Use a tiny bit over where your liner is (or where your eyeshadow is also). Just be sure to keep your eye closed, because it hurts like a b*tch if it gets in your eye. It also keeps your makeup in place if you sweat.
The active ingredient in BeneFit She-Laq is the same active in hairspray; a film former (PVP or PVA/PVM, or something like that). It places an invisible, plastic like shield over the skin (or hair) that holds everything in place.
And one more weird recommendation: I've heard runway makeup artists use actual aerosol hairspray over the model's entire face to set the makeup in place (so it won't smudge under the lights). I cannot confirm that to be true, though.