Welcome to the world of far east reproductions. all of the reproduced bumper that I've seen are made this way. The problem is they didn't take the extra 5 minutes to deburr the parts. Had they done that one wouldn't be able to tell them from the original ones. My original bumpers have a nicely round over edge, you can still see some of the grinding marks where they deburred them.
If you grind of the chrome your have opened it up to rust for sure and the plating will probably begin to lift at those points in the near future.

DG


Denny G
Sandwich, IL