Hi,
I made soaps for awhile a year or so ago. Now I'm planning to make some CP soap to clean my brushes that I use for oil painting. I wanted a light exfoliant in the soap and I have some "ground marble" a/k/a Calcium Carbonate (the ground marble is not from my soapmaking supplies its an art supply thing). Is this a safe ingredient? I don't seem to have any other exfoliants in my collection of leftover soap making supplies except maybe colloidal oatmeal.