Looking for an SCP

The SCP was a bucket of dark paint with a name of it and it can activated only under some circunstancess otherwise it would do nothing, in the scp there was a story about a janitor that was cleaning and the painting fell over him and people started ignoring him, at the point he could punch or steal thing and no one will seem something weird (is not Joe Schmoe) at the point he use a computer and write all things that happend to him, and after some days he ended up vanishing or stop existing, i also remember the name was like forgettable or irrelevant but i couldn't find it.