The technique of using an eyeshadow as eyeliner is also called ‘wetlining’. Also, somewhat related, ‘foiling’ is a term used to refer to eyeshadow used/applied wet on the lids. Anwyays, if you’re interested in trying to use an eyeshadow as eyeliner, but aren’t sure how to do it, here’s a quick, easy step-by-step how-to.