ShineMGood- Yeah that's the idea. Every scratch is most visible from one viewing angle. If it's a straight scratch you have to look at it from that one angle for it to look its worst. But if it's circular there's a good chance that no matter how you look at it some part of it will be at that worst possible/most obvious viewing angle.
I make sure there's wax on the entire surface of my pad, but *VERY LITTLE* wax. I hardly use any...a can of #16 lasts me for years and years even though I apply it pretty frequently. ScottWax says he gets maybe 80 wax jobs out of a can of it, and I bet I get a lot more than that.
I don't *always* clay before rewaxing, but I'll usually find some area that could benefit from it. I kinda suspect that if you went over any car before rewaxing with Sonus green, you'd find the clay had some contamination on it by the time you did the whole thing- seem like there's always *something* on it *somewhere*.