Fix a dented bumper cover
Fix a dented bumper
How to fix a dented bumper cover
Youtube has many videos on how to fix a bumper 
dent or crack and they make you think it’s as easy as smearing on some body filler. It isn’t. Those fixes won’t last. Body filler, also called Bondo is NOT suitable for fixing a plastic bumper because it’s a rigid filler. All your work will be wasted the second your bumper touches a curb or parking lot stop. I’m not saying you can’t fix a bumper yourself; you can. But if you want it to last, you’re going to have to spend some money on the right flexible fillers.
A hot water bath doesn’t usually work
Some Youtube videos show that a boiling hot water bath will allow you to push out a dented bumper. You can try that and it might work if you’re willing to live with some crease lines. But bumper plastics have a memory and they don’t usually just pop out to their original shape.
How do body shops fix a dented bumper?
They remove the bumper. Then use a heat gun and special 
rollers to “roll” the warmed plastic back to its original shape. See this video for more information on how it’s done.
How body shops fix a dented bumper
They remove the dented bumper from the vehicle.
Then use a heat gun to heat the bumper from the backside.
Once the plastic is pliable, they use hard plastic rollers to “roll” out the dent. It won’t just pop back into its original shape. See this video for more information on how it’s done.
©, 2019 Rick Muscoplat