 Okay. Well, what kind of primer? Well, you're going to use a primer that's designed to work with the paint that you select. So, for example, if you're going to work with the Benjamin Moore family of paints, you're going to use a Benjamin Moore primer. Okay. And the primer is the glue. It's the adhesive coat. That's what makes the paint stick. And then you put the top coat on top of that.