What is the best way to paint plastic?

Go to your auto part store and buy an adhesion promoter like Bulldog it will help the paint stick. Also make sure the surface of the chairs are clean. Try gently scrubbing them with a scuff pad then apply the adhesion promoter in light coats allowing 15 minutes to dry beteween applications follow with paint in the same manner. Also there are spray paints that are made for plastics SEM makes an Excellent product that will last for years.

There is a product being developed to restore plastic resin chairs from a company called Easy-Restore.com. It should be available by July 1, 2011. The product is simply mixed and wiped on to renew the color and shine to patio furnutire such as Plastic Resin Adirondack Chairs and home shutters.