THIS is why I had previously been banned by the wife from ever roasting again. Many years ago I worked with a lady who bought a coffee farm in some far corner of the world. She gave me a bag of coffee from her farm/plantation and I proceeded to roast the beans in a cast iron pan. Two problems with my approach, first I underestimated the rank stench and smoke that would naturally and normally occur. Second, I did not know that the beans would remain hot and continue to roast well after I was done applying heat. The resulting coffee was the worst I have ever experienced, it was tasted like it had been run through a cow first (like the civet coffee) ...SO dirty and bitter. Strangely enough I bought a bag of ground coffee from Big Lots several year ago that tasted just like my failed experiment. Perhaps she is selling coffee now.
Coffee base soap will probably occur at some point but I am not sure it will add much to the soap. ...and I will leave the potential sale and distribution to people who know what they are doing.