Yes I think you can, you just won't be covered under anything to do with your Esthetic license.   Put it this way...you can take a permanent makeup (tattoo) course and perform these services on the public regardless of if you are an Esthetician or not.  Your neighbour down the street might be a permanent tattoo artist without any license.  So if you were to do it, it would be an additional skill you had that wouldn't fall under your Esthetician license.   Unless somebody here can prove me wrong...then I am 99% certain this is factual.   ?????