What you describe is what we do SQ.
Got OH more wax, scented oil and wicks for Xmas so he can redo old glass candle containers. We cheat and place the pan of water on the log burner to melt the wax
cheap candles melted using free heat
It's not advised to melt straight on heat so we place the glass candle container in the pan of water.
The boys have had fun melting separate colours and adding in stripes so we also have jazzy candles in the kitchen.
Have fun with your candlemaking and post piccies of your results