tissue via its own unknown biological process. Although a T-800's physical covering ages like regular human skin, it can be regrown with enough time. During a confrontation with a T-1000 in 1984, the organic covering on its right forearm is destroyed while it is holding the T-1000 under a shower of acid, and it states that its dissolved covering would take years to regrow. By the time it is seen thirty-three years later, its covering was fully regrown, and the Terminator had spent some time working in construction, implying that it had become operational in time for it to regularly interact with humans. Physical template It has been shown that Terminators' flesh coverings are somehow grown identically, producing many multiple copies of exactly the same physical appearance, indicating the use of specific physical templates for different variations of a model or series. The most well known is that worn by multiple units portrayed by Schwarzenegger; a scene in Terminator: The Sarah Connor Chronicles displays a memory of a T-888 model, referred to as "Vick", facing a room (presumably in the factory where he was created) of several dozen units sharing an identical template to himself, naked and moving in unison to his direction.<ref>Episode 8, "Vick's Chip", Terminator: The Sarah Connor Chronicles.</ref> A deleted scene from Terminator 3: Rise of the Machines reveals that the T-101's appearance was based on Chief Master Sergeant William Candy, portrayed by Schwarzenegger with a dubbed-over Southern accent, which was replaced by the more menacing Austrian-accented voice of one of the developers. In a flashback sequence in The Terminator, a T-101 known as an "Infiltrator" bears the appearance of Franco Columbu. In Terminator Salvation, the T-800 is shown to be stronger physically than its predecessor, tearing a malfunctioning T-600 in half. It is also the first model to be manufactured using a titanium alloy. However, titanium loses strength when heated above 430 °C (806 °F) which later prompted Skynet's decision to use coltan, which is also referred as columbite–tantalite, for better heat resistance as its metal base as stated in Terminator: The Sarah Connor Chronicles; it is also used for the T-850 and T-888 models. According to Terminator Salvation, the T-800 was the first Terminator to have a human styled skeleton built using coltan and titanium alloy. The earlier Terminators had a bulkier design, though the 800 series are still large enough to necessitate their usual