Can I ceramic coat matte paint or a vinyl wrap?

Yes, with a coating made for the surface. On matte paint and matte or satin wraps, use a coating labeled matte-safe, which protects without adding gloss; standard gloss coatings can leave shiny patches. On vinyl, choose a wrap-compatible product. A suitable coating makes the surface easier to clean and helps it resist staining from bird droppings and bugs. Never polish matte paint or vinyl before coating; clean and prepare it with products recommended for that finish.