Claim: Sunshine Cleaning is named after its main character's crime scene cleanup business in which they first struggled with.
Evidence: Sunshine Cleaning is a 2008 comedy-drama film directed by Christine Jeffs and starring Amy Adams, Emily Blunt, and Alan Arkin. Mac recommends a crime scene cleanup job, and with his connections as a police officer, he gets Rose and Norah into the business. The sisters name their cleanup business "Sunshine Cleaning" and start making progress as their reputation grows.