This link may help you in choosing your paint. I used this (alabaster white) along with their clear coat.

Prep the surface; tape off what you don't wish to paint, lightly sand, I used 400 wet/dry then 800 wet/dry wash with an automotive soap and water, dry and wipe down. I also used a tackcloth and canned air supply (like you clean your computer with). Apply a coat of primer (automotive spray can stuff) when dry spray your base color and allow to dry. Inspect the finish to see if you need any touch up work before you apply the clear coat. After a couple of coats of clear coat has dried, remove the masking tape and give it a day to really set up and then reinstall the grill.

One more thing, when spraying, keep the spray can in motion and you'll avoid drips and runs.

Chrysler Crossfire Touch Up Paint