He used a small pair of scissors to trim his 'mustache'.
The actor was wearing a false/fake 'mustache'.
a 'mustached' man [=a man who has a mustache]
(..) Yes, what strange. - Three days at university ... But when I have a free day, and I was liftend by the Hills. You are otherwise come back. He Barry. - Hey Artie, you have a mustache? If your well. Do you have 't heard of Frankie? Going to his funeral? No, I do not go to his funeral. (..)2007 Bee Movie