Hello Heo,

It depends.
They have a "decay" time on a vanilla server, where the graffiti stays in the surface where you drawn it from during that time (don't remenber how long). After that the graffiti just vanish.

But that time is longer, I guess even perpetual, if you make the graffiti within the radius where you have building auth.

Yet, both of those timers are able to become custom on community and modified servers, since that is a server side setting.

Hope to have helped you.

Best of luck my naked fellow survivor!

Thanks bro!

You can also wash graffity off if you spash water on it.