Sorry, but Rust-Oleum Specialty Metallic will not work on plastic surfaces on its own. In order to use this product on a plastic surface you will need to apply a plastic primer first, model #182721. Once that has dried you can apply the metallic paint, or any other Rust-Oleum paint for that matter. The other option is to use Rust-Oleum Universal. It can be applied to any surface, including plastic, without a primer. The model number for the gold metallic is 261399.
Please contact your local Home Depot to find out if this product is available in a store near you.