Another classic pin-up make-up product is that bold liquid eyeliner. MAC's thoroughly modern Fluidline goes on smoothly, easily and stays on. Go with Blacktrack for a classic retro look.
This is the only eye liner I use. It goes on smoothly with a brush. You can choose to make your liner thicker or thinner depending on how much you want your eyes to pop! I live by this liner. The two best brushes to use with this are MAC Brush 210 or 263 I have both. It depends on how you feel...and don't worry if you've never used a brush with eye liner before...a little practice and you'll be fine :)