I wrote the following via a Library of Congress suggest terminology form:
I recommend establishing terminology similar to http://id.loc.gov/authorities/subjects/sh96007613 "Deadheads (Music fans)": "Metalheads (Music fans).
Warrants from your catalog include--
The big book of hair metal : the illustrated oral history of heavy metal's debauched decade / Martin Popoff.
American rock : guitar heroes, punks, and metalheads / Erik Farseth.
Metalhead / by Justine Korman ; illustrated by Guy Gilchrist Productions, Inc.
Metalheads : heavy metal music and adolescent alienation / Jeffrey Jensen Arnett.
The zine I'm cataloging that prompted this suggestion is about metalheads' culture, and doesn't reference the music at all.
Thanks for considering it!
Metadata sticker from Redbubble.