I'm going to try it on acne - Salicylic Acid ( BHA ) - Isopentyldiol - Ichthammol - Shea Butter (Melt) 1. Can we mix all of this together without สารกันเสีย ? สารกันเสีย and don't use cream maker, want shea butter is the main character because I see that I wrote a 1-100% usage rate. 2. We You can u...