Any recommendations for cleaning 50+ year old interior pieces/upholstery? Seats, door cards, etc. They're covered in a cloth type material (vinyl?). I think it's common material used in 60s-80s era Fiats. I assume you'd start with soap & water. Then what? Simple Green or Totally Awesome? Is there a Meguiars product or other brand after that is recommended? I want to stay away from Armor All. Not trying to make it look brand new necessarily and patina is okay. It's not damaged, just dirty, old looking and darker than it should be.