I used it on at least 2 cars and my trailer. It works. Just don't expect it to look like a new paint job. As the wax deteriorates the chips will become noticeable again. I say if your going to wax a car thats kinda rough anyway, what harm can it do to use this type of wax?
I have used black wax on my 69 to hide some chips on the rocker panel. It works reasonably well for black. Can't speak for other colors. It isn't bad if you want to decrease the presence of chips in the paint. Judging from the quality and reliability of the body shop folks I've dealt with in the past, I'll use the wax with color before I get a new paint job.
My last paint job as of 3 years ago is still haunting me. The wax is worth a try.
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