I did my lashes and brows all at once, taking my time, maybe 10-15 mins total. The instructions suggest doing one eye at a time, which makes sense for ensuring equal processing time, but I decided to risk it. I was careful to apply with precision, while using plenty of product. The result is great. It has been several days and is holding up well. The dye does stain the skin temporarily, and on my brows the black dye appeared more like a vibrant dark brown on day one. By day two, with normal wash...