actually, compared to drilling, the clips creates more damage to yr hood.. as downforce will push these clips to actually 'eat' into the steel of the hood after it has chew thru the paints...hence, u got a 'larger' surface area exposed to rust...
I am looking for this under dashboard plastic clips for Toyota Corolla. I think the clip comes in two parts, the bottom and the cap. Mine has the bottom part which is pushed into a metal...