Re: Threading?
Nair is a hair creme removal. I would never use that stuff on my face. It has chemicals in it that has caused skin discolouration in quite a few people.
Wax doesn't make your hair grow thicker at all. Threading is great if you know how to do it yourself, save yourself a trip to the parlour.
Be careful of waxing/threading your entire face. If the hair growth is that bad, you may want to look into some permanent, long term alternatives like electrolysis/laser hair removal.