I'm no pro, but what I'd do is cut one side seam and the bottom seam of a big trash bag so you have a big rectangle. In the middle of the rectangle cut a small slit maybe 4-6 inches long. Stretch it over your emblem so it's tight around the back. Reinforce the bag around the back of the emblem with some painters tape. Tape the perimeter of the trash bag to the body of the car, and maybe even a couple more trash bags around that to catch over-spray. Go to home depot and get a spray paint can, maybe a matte or gloss finish. Put on maybe 3-4 coats letting each dry in between. Once dry rip that garbage bag off you should be good.