Ah. I recall seeing this before as part of EVA AT WORK - an art project that involved all kinds of works from different genres with Evangelion as the theme.
I used to work as a lifeguard, and there were always these few old guys who'd come in for exercise -- men in their 70s who'd gotten tattoos during their time in the Navy during WWII.
Which is to say: can you imagine how this will look when you add 40 or 50 years to the ink and skin, and the body underneath them?
Well, he could follow the example of like one old guy did in real life. The old man asked his son to have the tatoos on his body taken off, preserved, and displayed.
Of course, I'm not sure if the guy in the picture getting old would prevent that.