Is it possible to change the scent of a TALLOW soap, say ARKO, by injecting a essential oil into the shaving soap. If so, how would I do it? I know that TALLOW soap can NOT be melted down and then add the essential oil. So how do I get the oil into the ARKO soap? Should I poke holes into the soap and then add some drops of oil or inject the oil into the soap with a injector? I would like to hear all possible ways in which to do this process. Everywhere that I ask this question on the web they talk about making soap from scratch - then add essential oils of your choice to the recipe. I want to change the SCENT of a pre-made tallow based soap and I would like to do this without putting in a drop or two of the ES into the already made lather or on top of the puck of soap. I want to get the added essential oil into the soap itself. Thanks