Much of this is personal preference. However, some surfaces, like wicker and rattan, have a nicer finish when sprayed versus brushing.
7 What kind of finish, if any, should you use?
Most paint companies offer a variety of finishes to choose from - satin, gloss, textured, metallic, hammered, and more. As long as you use an appropriate paint for your exterior surface and follow the instructions, you should achieve the finish you want. The really nice thing about the variety of paints and finishes available is that people can turn "garage sale finds" into treasures. Mixing and matching old and new creates a different and personalized patio set.
8 How many coats should you use
Follow the instructions on the can, however many paints suggest two coats. When painting remember this rule of thumb: Thinner coats are better than thicker coats. Thinner coats dry faster and produce a harder finish.