A different clear bra question (i think)

[mkdiehl]

Been reading all the clear bra threads but didn't see this question asked/addressed:

I understand the need on the hood and fender but wonder if clear bra really helps the bumper. I ask because the bumper is plastic and gives a bit when hit with a rock etc. It seems to me that if you put the film on the bumper and it gets hit with a rock, it will still dent the bumper since it is a softer material behind the film. Am I making sense? What I don't want is a bunch of dents in the plastic bumper or have the film return to its original shape and have a hollow area between the film and the indention in the plastic. Is the film worth it in this case?

Thoughts?