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]
(..) to smell worse. When I first started I had to dab peppermint oil under my nose to mask the smell. I actually tried growing a mustache, thinking that it would block the smell. It didn't. Just made me look like a creep who had this ever-present stench of death in his nostrils. Yeah, eventually you get used to it. The smell, I mean. Not Hodgins with a mustache. Every once in a while, though, a particularly nasty one still finds its way in. Couple of years ago-- (..)2016 TvShow: Bones Title: The Movie in the Making Season: 11 Episode 18