help!!!!!!what to use to repair damage bumpers? do you use fiberglass bondo?

 

if its damaged then just buy a new bumper.

 

if the scratches that you are talking about arnt too deep.. or not down to the plastic you can always wetsand over them, use 400-1000 gritt paper depending on how big/deep the scratches are and how muhc you actualy want to get into it.