When painting plastic or any plastic surface including outdoor plastic furniture including resin. It is best to use a spray paint formula that has been made just for plastic. There are two brands that make plastic spray paint labeled specifically for plastics. One is Krylon Fusion for Plastic or Rust-Oleum Specialty Plastic Primer spray paint. The reason to use one of these spray paint formulas when painting over a plastic item is that they will bond to the very smooth and pliable surface and will not peel off.