do you mean 2 scents blended, or 2 scents layered. I blend scents all the time. Its a good idea to do a q-tip test like moonshine said. Dip the q-tip in your scents then put it in a plastic baggie for a few minutes, then sniff. I used to make layered candles, but they didn't sell very well. The layers work fine and when you get to the middle line you get a bit of both scents at the same time for a bit, so you would want to layer scents that smell nice together.