Andy's Idea is right on the money - however be aware that there are many kinds of hot glue on the market. You'll find very low temperature ones at many hobby and fabric stores. The really hot ones are usually used for sealing cardboard boxes, etc and maybe could damage clearcoat. Besides if you don't have to burn your little paws so much the better.
Now here's a totally untested and completely wierd idea - you may know that some women use hot wax to remove hair from their legs, etc. This is similar in texture and stickiness to hot glue and works at very low temp (it has to especially if one is using it on the bikini line!). It will go into a thick liquid at about 120 degrees. If you applied this to the end of a dowel rod, then stuck it on a hail ding or other small dimple, I'm thinking you could pull it out. This stuff would also peel off very easily if warmed by a hair dryer.
As a teenager a friend and I kept her alive by using a toilet plunger to remove 99% of the evidence that we had "borrowed" her dad's car to practice driving.
By the time he noticed it he thought someone in the parking lot at the grocery store must have hit him with a cart.