I had a couple of scented spent candles to refill. The wax of each of these was melted separately along with new beeswax. The new candle will have a more subtle scent than before, but will retain some scent. I've found that mixing soy wax + beeswax works just fine. I also find that I often like the more subtle scents even better.
Beeswax is an amazing material that smells great, burns cleaner than non-beeswax candles, and can be melted into new candles over + over again. Nature does it again! :)