ive got mostly grey hair on face that are related to acne, sebum plugs , etc.have started taking isotretinoin recently. after it's done (& also a gap of 8~9 months) I'm planning to go for hair removal, but although these hair are grey they've got nearly melanin-less follicle. they look really terrible for me. if carbon dyeing isn't going to work then shall I shave them so they might grow darker or within a laserable color range?(I'm currently 18y old)