it is depend on the shop workmanship, if they don't have skill or the body kit was not original. most of them will just drill hole and revert. the original body kit come with internal hook and just need to drill hole at the car body and place the hook bracket, the bodykit just clip on and some double side tape for cover the bodykit eadge gap, you will not see any screw or rivet from outside your body kit.

If you're driving a BL, there's no hole at the bumper for the skirt's clips.. But anyway, if you're going to buy, I guess u'll be buy the aftermarket one right since buying the original from proton will cost 19++ without the spoiler..

So the aftermarket wan doesn't have any clip in front. Just 2 screw that shares with your fender cover.. The rest will be double sided tape..