There is not enough skin on the forehead and it will be more of a glide in that area. You are still working on the frontalis muscle. What Mode Do I Use For Surface Wrinkles? Erase mode can be used on surface lines/wrinkles on the face and neck. The movements are quicker, and should be made the opposite way of the wrinkle. If the wrinkle is horizontal you are going to do your movements vertically.