Back in olden times I worked in a production machine shop. We had one particular guy who was not liked by anyone- he started his machine 20 mins before shift, worked 20 mins late at the end of shift, worked through lunch break, spent lots of time sucking up to the bosses, brought them gifts, squealed on everyone for any minor offense he could; you know the type. He also had a lot of bad habits; picking his nose, rubbing his crotch, digging in his ears, etc.
He thought he was management material, so he wore Leisure Suits everyday, to look more "executive". Not normal suits, but baby blue, toothpaste green, pink, white, polka-dotted, & canary yellow. In a machine shop he looked like a clown.
One day, on yellow suit day, someone decided it would be good payback for his tattling to Prussian Blue his machine. (Prussian Blue is a toothpaste-like permanent dark blue dye for metal layout)
They ran a bead of bluing on the underside of every handle & wheel on his machine while he was schmoozing the boss. He returned & began working, never noticing the blue on his hands.
Half an hour later, he had blue hands, blue nostrils, blue crotch, blue ears, blue a$$ crack, & various random blue blotches all over. Everyone in the shop was laughing so hard they couldn't function, but he didn't have a clue. Finally, a boss noticed & tried to scrub him clean with acetone, but no luck. He went home, & didn't come back for a week. When he came back, he found a note telling him he could expect such treatment from now on, as long as he was a stoolie & suckup. He changed his ways, & actually became a fairly decent guy.