What happens when fake tan is sprayed on real tan?

I have neutrogina micromist tanning sunless spray http://www.neutrogena.com/ProductsDetail鈥?/a>





If I spray this on both tanned and white skin- will both get darker or will just the white skin?





I want to use this to even out tan lines (like shorts tan). Should I put something on my tanned skin to block the effects like moisturizer? Or is it unnecessary?What happens when fake tan is sprayed on real tan?
i used it and it didn't help. well wen i sprayed it ontop of my tan it like turned my skin orange. but when i sprayed it on top of like where i'm white it didn't really get than drak. i have a bad tan line, and this didn't really work. i just decided to go to the beach. just get natural tanned it so much better.What happens when fake tan is sprayed on real tan?
you will turn orangish, but not transparent like the first commenter said..
actually they cancel each other out and you become transparent...
you turn orange
well you might turn orange