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]
(..) I cannot believe you had to sat to say that. I'd say it again, and with no question or hesitation. It was the best picture in history of baseball. Are you lying about the Lakers, is that what it is? Or is it the mustache? You're just jealous! Jealous!?! Brace, Brace! Heads down, stay down! It's ok. (..)2016 Sully