In this post, Modifying our lotions into creams, Dawn asks: I'd like to use your thick cream recipe and add bentonite and kaolin clay to make it an exfoliating foot scrub. Can I simply add the clays to the finished cream at safe usage rates"
Adding clay really can be as easy as adding a certain amount to a product you like and rejoicing about it. However, it's not something you can keep around your house forever. And be aware that some clays dissolve really well in water, so test a small batch first to make sure you aren't creating mud!
I suggest keeping a clay in lotion product for a short period of time, maybe four weeks tops, and using a preservative intended for hard-to-preserve products at the maximum rate. (Something like Germaben II or Phenonip would be good choices here.)
Creating a surfactant based clay cleanser
Using the surfactant base to make scrubs
Physical exfoliants (part two)
Facial scrubs, more exfoliants
Duplicating products: Trilogy's gentle face exfoliant