Hi @kavi,
Thank you for your question about what paint to use for your patio ceiling.
Being in an exterior location, you would have to use an exterior paint such as Taubmans All Weather, however you wouldn't typically use a gloss paint. Gloss paint has a highly reflective finish. On a ceiling, this reflection tends to highlight every bump, joint, roller mark and small defect in the plaster. Ceilings are rarely finished as smoothly as walls because they are harder to work on, so a glossy finish makes imperfections far more noticeable.
For this reason, I would recommend using something with a matt or flat finish, such as this Taubmans White Matt All Weather Exterior Paint.
Let me know if you have any further questions.
Jacob
