Hello I am looking some opinions. I have a theater company that uses my theater that like to use vinyl drops that are stereotypically used for billboards for their painted backdrops. I do have a certificate from the company stating that is it is Flame retardant and resistant which is also registered in NYC. So I am not looking for advice on flame redartancy. My Question is: What is the Pros and Cons of using a Vinyl Drop vs. a Muslin drop for use as a backdrop?