I use hemp seed oil in my whipped butters because of it's properties, I hadn't thought of soaping it. Grapeseed oil has a short shelf life, I don't use it anymore at all. Cocoa butter is wonderful in soap...and just about everything. SAO is a great oil, I don't use it in soap but I use it in lip balm, whipped butters and sugar scrub. It's very versatile.