Climbers’ ropes secured around their torsos, Jason Coatney and Armando Balmaceda stand in a melange of open paint cans and brushes. These two muralists of Colossal Media, the largest hand-painted advertising company in America, are heavily layered in sweatshirts and raincoats. But in this industry, c’est la vie. Paintbrushes in their fingerless-gloved hands, earbuds in their ears – “I like to start out with Miles Davis in the morning,” Coatney smiles, his breath visible in the frigid air – they begin yet another workday in the sky.