If it doesn't say not to on the warnings it's fine
Melanocytes are cells that produce the dark pigment, Melanin, which is responsible for the color of skin.
bioluminescence. Chemicals in their skin.
depending on your pigment ... A suntan will leave your skin darker while a sunburn will leave you skin red ... if your very pigmented (black) your skin in all cases will get darker ...
E.T is a dark skin couler with a bright orange and yellow glow in his tummy
Tattooing black skin is much different than tattooing a white or brown skin pigment because you can usually only use black ink because color doesn't show up as well as light pigmented skin, so a dark pigmented person might be limited to there ink colors and some tattoos on certain areas of the body...
moles
lesions
Glow sticks will stain your hair, clothes, and skin. (It is non-toxic, though). After a while, it will wash off.
melanomas
... using naked skin as a base to paint art. When the art is in a permanent and pigmented form, it is called tattooing. Best example: http://www.cddesign.com/covertalk/images/pink-floyd-body-paint-thumb.jpg
melanoma
Yes, but your skin has to naturally be tan or dark, if you paint your skin tan, it will not prevent sunburn.