This is my method for what it's worth. I first get the edges wet. Then when let it soak into the leather and return almost the it's original color. Then when I edge it, it sort of burnishes it automatically. Then I rub beeswax on the edges, this get's the friction going which is what you're looking for. Then I get a heavy cloth like canvas, denim or anything it doesn't matter as long as you get the heat going in your hands you know you're doing it right. You should get a nice dark brown look. Hope this helps.