I do subscribe to the theory of a waterless wash being safer on paint than a QD for anything more than light dust on a garage queen, so I have Sonax BSD, Kenotech, Griot`s BOS, and Britemax on my shelves and they mostly get used in the garage. For anything outdoors, it`s DG Waterless, Ultima or Optimum. I regularly use DG and Optimum Rinseless, but I don`t see any real wax boosting qualities, so my spray waxes, Aquawax, Optimum and D156, get used as drying aids. IMO, the only product I have on the shelves that crosses boundaries is the BSD. Again IMO, it offers the cleaning properties of a QD, along with a level of protection that rivals spray waxes.
Bill