Black Light Visuals travels to music concerts and lets festival-goers dip their arms into vats filled with their fluorescent dyes, leaving them with marbled appendages that glow in black light.
Here's a closeup of the body marbling:
Perhaps you need a marbled fanny pack:
Or Captain's hat:
This first-person clip is especially lovely:
• Lollapalooza Chile 2018 : Body Marbling Activation (YouTube via Black Light Visuals)