I glued the filler plate in using structural adheasive and the two screws to hold it in place for good so I can smooth my front bumper out. I used a Lord Fusor glue. Then I used some "Shark Bite" branded filler to smooth everthing out. Then on top of that I used some high build primer to dial the rest of the imperfections in to a very minimal. I did this four times and everytime I used guide coat and block sanded.