I have a piece of soap, what I have painted with colors. Its made with glycerine. I would like to put this piece into another mold and pour some clear over it, but I am afraid the hot glycerin will melt the middle piece and the paint will be all over the clear. Is there any suggestion? Like a spray or some technique to prevent one piece of soap to be warmed up when pouring another layer over? I don't know if I am explaining it well, but hopefully someone will be able to help. Thank you!