I have never had a problem with it messing up the rustic look of the other layers. I do let those layers set up some before pouring the next one. I have had layers blend before when I didn't let it set up enough and the wax was maybe too hot. It then went through the layer and blended it with the one below. I use the freezer sometimes to speed up the setting of the layers, but not always. Never used a cold cloth myself. I think with everything you can't be afraid to experiment. If it messed up or doesn't look good you can either make it into chunks, remelt or try the spin. the spin has saved a number of so so candles for me including that brown one in the first picture. and feel free to ask any questions I know I learned how to do many things by reading books, seeing other people's pictures and asking them questions myself. Misty