the scent thing was originally going to be 'old cigarette butts', but ended up being some sort of spice (it was a car freshener promo item for estrus. we loved the idea of a car freshener that smelled like old cigarettes). turned out the printer dipped in old spice them because he didn't want to stink like an old cigarette for a month.
another time we wanted to put strawberry scent in the fountain on a big 6-color offset press. the idea was to do something stunky like that madonna album that reeked of pachoulie. the printer backed out at the last minute because he'd never get the stink out of his press.
so, not too well.. . theoretically, it should work fine, but it'll stink to hight heaven at the press for a long time afterward.
i've put scent in ink. also a friend's ashes (just a touch.) also a hit of acid. i've printed with clear with phosphoescent and pearlesent and various metal shavings. there's that heat-sensitive stuff. puff. what else?
how 'bout cum? i'm sure it's been done by some pervert mad at the boss ...
it's been over 15 years, but i remember it was a reddish pms color that was extremely unstable and faded to a strange green color. it could hide browns underneath and they showed when it faded as a blackish color. it's been too long to remember the exact numbers and such. sorry, best i can do.