"Patience" being the key word here.:D
If you want to try it yourself use every little tool you can find to get the right curves you need.
I have used washers rounded on the edges, small pieces of hardwood, cut down drill shafts and about every other thing you can think of.
Using a hardwood backing surface works good for supporting your metal without ruining the area around your ding.
Then file and sand to get the small imperfections out.
I see Leanna posted before I did.
