I know we as women do not want people to know we have a mustache. You can wax it or even try to Nair it, both can be painful. To bleach the hair on your upper lip, mix 1/4 cup of hydrogen peroxide ( 6 percent) with 1 teaspoon of ammonia. Dip a cotton ball into the solution, and dab it onto the hair. Let it sit for 30 minutes, then rinse off with cool water.