Hi helpful Vanagon enthusiasts.

Anyone have a recommendation for black paint to be used to restore the front black plastic grill on a vanagon?

I went to clean one of mine and the wipe of the cloth with plastic cleaner r wiped it right down to grey material.  I’m thinking I need a plan to prep and spray black. 
Anyone done this or similar work on exterior plastic and have a recommendation for the process and materials, especially correct paint or primer.

Eric Caron 
84 Westfalia Grill

If I can get the materials