Never count on what people will do. Just an example I shrink wrap all my wood soap decks and had a customer come back and complain they do not work. After talking to her I asked her if she un-wrapped it. Nope, she did not. So never depend on someone taking off the big pieces of salt they will think it is for exfoliating. You can use clear m&p to add pretty chunks on top of the soap. My theory is if it can potentially hurt you it does not belong on a soap.