Acetone helps break down carbon, it's not as effective by half without it. Pretty nasty to handle though...
One note, the recipe says melt the lanolin to mix it but the first time I tried this I tried to pour the molten lanolin into the rest of the mix into a standard chemical bottle with the narrow neck and normal coke bottle size lid. The lanolin blocked the funnel, the heat of the molten lanolin caused a rapid expansion of the bottle content and there was a spontaneous reversal of flow direction. And an unscheduled undies change, no other real harm done apart from a primo mess... Mix in an open top container and transfer when mixed, make sure your container (and lid) are acetone rated as I've found a few where the bottles are good for a while but the lids aren't and die young!
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