[WhiteFang]

Yes, I'm serious. But I can only recall doing so once or twice. Generally speaking, by the time I finish waxing the last thing on my mind is washing it again. Way too pooped to do so...

Anyway - after you wax the vehicle there will be a lot of wax dust left from buffing (either by hand or machine). The last wash is to remove the dust. Think of it more as a rinse cycle than a wash. No soap required, just a clean water rinse.