I believe that it's clips all the way around. Can you see or feel any clips by looking through the grill with a flashlight or worklight?
I am trying to take of the front grill to paint it black. The top part comes off no problem with the removal of the four screws. The problem is with the lower section. The bottom part pulls out no problem, but the top edge almost seems glued to the bumper structure. I don't see any fasteners. I have tried pulling pretty hard to the point that I am afraid that it is going to break. Is there something that I am missing?