Dent/Ding Repair

[Zedder]

I just purchased an original paint car that has a number of small dents/dings from years of storage and minor mishaps at the drags. The paint is excellent and I really want to save it. Has anyone used those dent repair services that claim to repair door dings and small dents from the inside without damaging the paint? If so, do they really work? I know one local fellow that swears these guys perform magic, but would like to hear other opinions please. Thanks in advance,