Face/On (the strip title) - parody of the movie title "Face/Off"
Will Shatner, See: Halloween - The movie Halloween used a William Shatner mask, spray painted white.
Jason mask - Jason from the "Friday the 13th" movie series is known for wearing a hockey mask.
The hints? Hell if I know.

Dom speaks:
Okay, so it started as a way to put Ed's "self portraits" on the 'net. And then it turned into a riddle.
Ah, well...

Dom speaks:
This may be the first SGD where Ed is credited, but it's not the first one he's contributed to. I talk to him a good deal when we're goofing around with ideas...