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]
(..) Le Chiffre arrived yesterday... ...and spent the time reestablishing old relationships. The chief of police and he are now quite close. That's him, with the mustache. Over my left shoulder. Well, that could make life quite difficult. Yeah, and quite possibly shorter. He's not a very subtle man. (..)2006 Casino Royale