NYX Marsh Mellow Primer Oily Skin 8 Hour Wear Test Review! I applied this primer on the right side of my face to have a side-by-side comparison of how my skin is looking/ holding up throughout the day with and without using the NYX Marsh Mellow Primer. I will also, be doing an 8-hour wear test, checking in every few hours providing an update on how my skin is looking. Keep in mind that I do have combination oily skin, so the t-zone areas around my face get oily, crossing my fingers this works!