I am wanting to formulate a honey and oil containing facemask. There will not be water in this product. For this, I understand that as there is no water I should not need a preservative but I want to add a preservative due to storing this product in the bathroom and can generally get wet. Now, if I add an oil-soluble preservative do I need to emulsify the oil and honey together? If so what emulsifiers are good to emulsify the oil and honey together?