Nair is a thioglycolate that dissolves sulfide bridges at hair If you use it on sensitive skin though it causes a rash
I think that a version of nair where a first fluid is an emulsion with metal ions like Zn that just attach to hair rather than skin then a second fluid that is catalyzed to be active thioglycolate is possible
if it works then Gilette could have a new product-- beanangel, Aug 20 2009 wikipedia thioglycolate http://en.wikipedia.../wiki/Thioglycolate [beanangel, Aug 20 2009] random, halfbakery