I am reconditioning a broken car top cargo box. It is a Pakasport made of fiberglass. I bondo the broken parts and now need to paint it. Will an acrylic exterior paint work? Do i need to prime with an oil base primer first? Any ideas on this would be nice. I can't put much more money into this so I am trying to avoid expensive auto paints. It is gloss black which is tough to make look good. Thanks for any imput. Joe P.S. I hope to sell the thing