wouldn't the hot glue mess up the paint ??
- i heard suction cups do wonders , just don't over do it or u will end up with an outwards bulge.
- what i did with dings on my doors was this : let it heat in the sun , then stick an ice cube on it , it pops right out .. magic

, but i am not sure if that will work with a bigger size dent .
- that spot should be easily accessed from the wheel well , after removing the plastic cover , maybe try and push it out ??? ... that is just a noob suggestion though , i am not sure how it will react ... might make it worse or flake your paint ...
hope this helped.