Reversing Oil is to send the nasty tricks and hexes your enemy has thrown at you BACK AT HIM. Reversing Oil turns their hateful magic right back at them, giving them a taste of their own medicine.
Reversals are an effective way of dealing with enemies throwing magic at you, without giving away any of your own power over to them. Dress black/red reversing candles with this oil and burn them down over your enemy's photo. Anoint evil eye amulets with this oil and wear them as a mighty protection that reflects any malicious magic back to its source.