I never heard of "minging" a car. Was that something done in those old Flash Gordon serials?
I dunno the hows or whys of the stuff, but I've used it on both clear coat and non-clear coat finishes with equally good results. I don't know of a specific link to this stuff, but I've used the clay bars from several different manufacturers. The last one I got was from Mothers. They all seem to work about the same.