Question: What are the masks that Bill Johnson's character in the 1986 horror film made of?

Context paragraphs:
Truth or Dare? (film): Truth or Dare? : A Critical Madness is a 1986 horror film written and directed by Tim Ritter, and based on his short "Truth or Dare?"  from 1985 anthology film "Twisted Illusions".

Vampires (1986 film): Vampires (also known as Abandon) is a 1986 horror film directed by Len Anthony, who also directed "Fright House" (1989) and "Murderous Intent" (1985).  The film stars Duane Jones, John Bly, Jackie James, Orly Benyar, Kit Jones, and Robin Michaels; it was the final film of Duane Jones, best known for his starring role in "Night of the Living Dead".  The cinematographer was Ernest Dickerson, who later worked with Spike Lee and directed some episodes of horror TV show "The Walking Dead".

Leatherface: Leatherface is a character in "The Texas Chainsaw Massacre" series of horror films and spin-offs.  He wears masks made of human skin (hence his name) and engages in murder and cannibalism, alongside his insane family.  Leatherface appeared in the first film in the series (1974) and in its six subsequent continuations and remakes. Wisconsin killer Ed Gein, who wore a mask made of human skin, was reportedly the inspiration for elements in the original film.  He is considered to be the main antagonist of the franchise because he drives most of the plots and appears in all of the films even though he takes orders from his older family members.

Robert Harmon: Robert Harmon is an American film and television director.  He is best known for the 1986 horror film "The Hitcher", starring Rutger Hauer, as well as for films like "They" and "Nowhere to Run".

The Texas Chainsaw Massacre 2: The Texas Chainsaw Massacre 2 (marketed as The Texas Chainsaw Massacre Part 2) is a 1986 American dark comedy slasher film directed by Tobe Hooper and serves as a sequel to "The Texas Chain Saw Massacre", also directed and co-written by Hooper.  It was written by L. M. Kit Carson and produced by Carson, Yoram Globus, Menahem Golan and Hooper.  Starring Dennis Hopper, Caroline Williams, Bill Johnson, Bill Moseley and Jim Siedow, the plot follows a radio host victimized and captured by Leatherface and his cannibalistic family while a former Texas

In the Shadow of Kilimanjaro: In the Shadow of Kilimanjaro is a 1986 horror film based in Kenya.  The film was directed by Raju Patel.

Neon Maniacs (1986 film): Neon Maniacs is 1986 horror film.  The film was also released under the title Evil Dead Warriors.

Bill Johnson (film and television actor): Bill Johnson (born December 16, 1951) is an American actor, known for his role as "Leatherface" in the 1986 horror film "The Texas Chainsaw Massacre 2".

Terror at Tenkiller: Terror at Tenkiller is a 1986 horror film directed and produced by Ken Meyer, and written by Claudia Meyer.  The film was shot entirely in Oklahoma near Lake Fort Gibson and the Fort Gibson dam, though not at the actual Tenkiller Ferry Lake as the story suggests.

Blood Hook: Blood Hook is a 1986 horror film distributed by Troma Entertainment.  The film was premiered at the MIFED Film Market in October 1986 and released in the USA in April 1987.

Supporting paragraphs: Bill Johnson (film and television actor) Leatherface
Answer: human skin