Method for collecting body paintings?

The Age recently published an interesting story about how many tattoo enthusiasts see collecting tattoos as collecting traditional work of art. Here’s the link to the story: Tattooing is booming with celebrity artists being pursued for their work

Of course, the main difference is instead of running out of wall space to display the art, these collectors run out of skin real estate on their bodies, which prompt some of them to get tattoo removal.

This makes me wonder as body painting becomes more accepted, how would one collect body paintings?

The obvious way is to photograph the finished painting then collect the print of the photograph as they would a regular photograph, but I can’t help to wonder if new ways of collecting would appear.