His later work was influenced by his interest in Maxfield Parrish, Hannes Bok, EC Comics, and various science fiction illustrators.
Metzger contributed to such publications as Gothic Blimp Works and Bill Spicer's Graphic Story Magazine.
In the early days of the original Star Trek, Metzger and several friends would gather every Wednesday evening to watch.
The cover of Metzger's comic book Truckin (Print Mint, 1972) includes a self-portrait in the truck's mirror.
Metzger later worked for several animation studios in Vancouver, including Marv Newland's International Rocketship Limited.