Yesterday, 3rd August that is, I went on an advanced CP soap making course, although I didn't learn much in the way of layering and swirling etc., I did get to make a whipped soap a la Nizzy. It was really easy to do and it stays workable for ages so I got to play with it and eventually got round to piping some soap shapes. I am really impressed at what you can do with it and shall be doing it again.
I didn't make the base soaps but I did cut the shapes out of some premade soap. Pretty nifty if I do say so myself.