To spray hand sanitizer and disinfectant all over the past, so that people forget what it was really like in favor of what they read about it being like in a book.
When a white (caucasian) man has rough/aggressivesexual intercourse with a white (caucasian) woman who has been blacked, typically for revenge or self-vengeance. This may go on for about a few hours at least.
When somebody turns a dark skinned character white because they think that their skin colour is bad so they turn them white and think that they "fixed it" or "made them better".