skin is best with an all glue attachment. In fact it's easy, but the thing I don't like about skin is that you can't stretch it like lace. With lace you can kind of play around with the hairline curvature. With skin, you try any stretching, your gonna get wrinkles that will never go away. And, if you don't do a full bond, when you pat it with your hand you'll hear a loud plastic type sound.

I heard of a glue that is expensive, but lasts well over a week called NX Gen Unifying Agent. I'm gonna try that next to see if I can go from weekly attachments that need touchups after 3 days, to two week attachments that need no touchups, other than a hairline cleaning.