Pinup hairstyles were popular between the 1930s and 1950s, and these days the hairstyle is making a comeback. There are so many pinup-inspired styles to choose from and they are simple to create. One such hairstyle is pin curls and here is how to make them. After washing your hair, you want to let it air dry for thirty minutes then part your hair to where there is a separate section of hair at the top. Once you do this you would apply bobby pins all over your hair and let the pins stay in your hair for an hour. Remove the pins and style.