Thorough scrub with dish soap and water, using a scotch brite pad.
Paint was WalMart flat black .97 per can. Biggest investment was the silver paint pens from the hobby store, they were 3-5 bucks each. I bought 2, one with flat broad tip for the raised fins, and one wiht pointed pencil tip for the headlight surrounds that have the ridges, but are not open fins like the main grille. Next up is detail of the DODGE logo in the middle, in red, for fun.