With most car paints you will need to remove the top coat of paint to the metal, and then paint it with primer. if your vehicle was previously painted this type of enamel, car paint will adhere to the prior layer of paint. other paint will slide off the body Aug 12, 2005 · the best thing i can tell you is to use clearcoat made by the same manufacturer as the paint you used, and to make sure it is compatible. acrylic clearcoat won't work on enamel, and won't work on krylon fusion. acrylic clearcoat for acrylic paint, enamel clearcoat for enamel, etc.... Colorful enamel paint in a spray can helps to bring that furniture back to life. use a pressure washer set to low pressure, or use a water hose, soft brush, and mild detergent to Spray a thin coat of enamel onto the metal object, using the same technique you used with the primer. allow the enamel to dry overnight, and then add another coat of enamel. allow to dry overnight again before using the metal object.