My brother in law backed out of his garage and gently into the side of my company owned vehicle. I took it to a PDR guy and watched as he meticulously worked the dents out. Took him a couple of hours. I won't say it was perfect, as there are some body lines that were tough to work on, but if you didn't know it had been there I don't think you would spot it.
Fixing hail damage on a nice round surface like a '52 GMC might be easier? The good news is...things like hoods, fenders, etc. as still accessable!