I started a thread with the same topic; "Hair removal products." We're having the same dicussion in there!
My Nair experience wasn't great. Not as bad as your's though.. sorry to hear about that.
Is there any warning on the bottle about sun exposure after use? If not, you should get in touch with them.. or a lawyer (!!) if it doesn't clear up.
I Naired my arms once, years ago.. and it burned/tingled during and after use, and smelled horrible (Which I could have dealt with if the product had worked.) I ended up with patches that didn't fully remove, and ended up having to shave my arms anyway!
I shave my arms now and it seems to be going alright. As another poster said, the hair grows back in soft, not thick and rough like I was afraid. I shave them once a week. It looks a little funny growing back in.. but it's much better than the "monkey arms" i used to have! haha
I use a Sally Hansen wax on my upper lip. It seems to do the trick for the most part. It's a bit painful, but for such a small area it's bareable. I don't use it very often.. mostly b/c its a pain.. gotta microwave it, then let it cool, apply, wait, remove. the applicator won't ever be totally clean b/c the wax hardens on it. The container gets all caked with hard wax. So a good amount of the wax is wasted b/c it's dried on the applicator and container!
There must be an easier way!!! Maybe one day... *looks off into the distance with dream-filled eyes*