Jean-Claude Van Damme The Lean Mean Porn Stache Machine

2/14/2012 10:00 AM PST

Jean-Claude Van Damme -- The Lean Mean Pornstache Machine

While on the set of his new flick "Welcome to the Jungle" in Puerto Rico on Tuesday, action star of yore Jean-Claude Van Damme proved he's still the Muscles from Brussels by showing off his tan, buff bod ... and his new Tom Selleck approved '70s porn stache.

This is one hairy situation the 51-year-old may not be able to get out of unscathed.