A clip that fast-forwards through the painstaking process of applying the artwork to the pair has been released to celebrate Jeans for Genes Day on Friday, October 5.
After stripping to their underwear and having a group of painters crowd around their lower bodies, Falcone and Penna then model their new 'jeans' in a shirtless workshop-themed photo shoot.
Behind-the-scenes footage shows them joking around and playing with fire extinguishers and blowtorches between shots.
Jeans for Genes Day is held to raise money for Genetic Disorders UK and provides funding for the care and support of children with genetic disorders through a grant programme.
Members of the public can sign up for a fundraising pack containing information on how to organise a Jeans for Genes event at schools and offices.