Full face tattoo and getting multiple people on board might do the trick for however long until additional markers are found for the edge case. I think clown makeup would do better since it varies day to day.

So at least they are honest about it.

One more tip on how to achieve this: start a “Meet now” on teams and change your status to available. Green all day. Bonus is that it also keeps my work laptop out of sleep mode and on VPN when getting a coffee at home.