I don't think you can temporarily go gray or lighter, what my hairdresser said (when I wanted to dye the growing out period) was you needed to bleach as light as you could and then use a white toner/dye like manic panic. It can trash your hair. I dyed lighter and lighter for awhile and then did some highlights for transition. I agree not all grey looks great, when mine was only some gray it mostly looked drab and sloppy. That is why I like this so much, it is not just gray to prove a hippy point, it looks nice.