You will most likely have a bunch of rivets combined with holes (depending on where the trim is at). My car originally had the GT trim that goes onlong the lower part of the side and over the wheelwells. If memory serves me correct, a lot of the side trim was held on with studs with nuts on the inside of the panel. That was 22 years ago when I eliminated them, so i could be wrong, but I do remember holes in the body needing filled.