I am also cautious, but I haven't done any hail repair at all.... unless you count the time I threw a wrench at my '57 Bel Air in the sixties! (I don't do that any more.)
My belief is that you should talk to the guy who has done it! The one I mentioned was a graduate of GM body school, who eventually became my shop forman. Before I hired him, he had grown up, and learned the biz in Kansas.