Effects for film have evolved dramatically over the years with the
addition of computer technology. Frequently the mechanical and technical
will work hand-in-hand to create that final effect. The team of
mechanical special effects and pyrotechnics experts at Warner Bros.
Studio Facilities can provide productions with the best in special
effects know-how. The teams need to work fast, to a high standard with all materials. Thats where Perma-Grit comes in. http://www.warnerbros.com/studio/services