I've just had my ASIC tattooed straight onto my left bicep.
My mate Snake Eyes did a great job, coloured and all you can hardly tell it's a facsimile!
If you are concerned about not having your ASIC appropriately displayed when airside, if it keeps you up at night, I am more than happy to put you in touch with Snake Eyes so he can imprint your card to skin too!
(And the ladies love it
)