I want to make my own joint and muscle pain massage oil. I would want to include cayenne powder and turmeric in it. I imagine I would just mix my desired ingredients into a carrier oil -- sesame, peanut, olive, etc. -- and store the mixture in a bottle for later use. Would there be problems with this though? Would powders mix well with oil, or should I use actual parts of herbs and allow the oil to soak up their essence? Would there be any problems with storing the mixture?