Rock chip, bumper needs new paint?
 

I hope someone who knows about paint can answer my questions. My dad owned the C230 for almost 6 yr, 90% of the time being driven in the city. Not a single paint chip on the hood or bumper, OEM paint quality I guess. Then 2 years ago, the front got hit and run in a parking lot and I replaced it with AMG style fiberglass bumper, it was a bad idea as it didn't last for 6 months then starts chipping. Bodyshop blamed the quality of the fiberglass bumper, but a friend of mine is facing the same problem with his polyurethane bumper.

I need to do something about it, not sure what would be the best way to deal with it.
1) Bring the car to another bodyshop, what do I need to tell them?
2) 3M clear bra (I heard it will turn yellow after awhile)
3) Stick with OEM bumper? $$$
4) Vinyl wrap the whole car

wrap it

3m paint defender spray. If it turns yellow spray windex on it it will dissolve it.

^ thanks, but before that.
does it have to do with the paint (like how many layers, or different type of paint, or wasn't done properly) or mainly the fiberglass bumper itself?

I am guessing the paint job itself. My Brabus front bumper was repainted once and same situation starts to have rock chips. I brought it back a year later told them what happen they put thicker layers on. So far so good, and I just found the 3m spray I guess it will last.