During lunch, I went shopping at my local Carquest. I saw they have DG Rain Repel Glass Cleaner on sale for $4.99. I picked up a bottle of this, and FCS. On the back of the RR, it appears as though this product could also be used as a QD? Has anyone tried this? It states, "can be used as a cleaner and gloss enhancer on painted surfaces, chrome, almost any non-porous surface". Just curious...