Welllllllll..... I saw all this too late (or rather, I didn't wait long enough for anyone to reply)....
I used Nair. I did a patch test - no problems. So I did my face... It didn't hurt and I washed it off exactly at the 3 minute mark.
It has 'burnt' my face. My skin, which was smooth & unblemished before is now red, raw, bumpy & painful.
I've taken antihistamines for 2 days and been using water and 8hr cream on it. The 8hr cream is the only thing that has soothed it.
So my suggestion is, don't use it.