Re: Rear Stock Bumper Dent
You can take it off, heat it with heat gun or hair dryer, reshape it and hold it in place while still hot, then immediately cool it with cold water. It will hold it's set as you go from hot to cool. Post photos.
If it won't hold it's shape as you reform it, you can do a little bit at a time. Heat it, shape a bit, cool it to hold it's place. Then start another section. You may need something like a wooden dowel to push against the plastic.