In case you missed it, Bella Hadid just tore up the Paris Fashion Week rule book by wearing a spray-on dress on the catwalk. She didn’t just wear it though. The supermodel arrived at the Coperni show in nothing but a g-string before three assistants spray-painted a white dress on her. The technicians spraying the dress onto Hadid used pistols that looked something between a paintball gun and Spider-man’s web launcher to coat the model in a layer of silly string. It was only when another assistant came onto the stage to cut a leg slit and arrange Hadid’s shoulder straps that it became clear tha…