Appliance enamel is suppose to be a tougher finish, but your color choices are slim and rattle can finish is all you get. Avocado, bisque, white. Dash boards take a beating from the sun and people, I'd be trying to make sure it will last.

Do your self a favor and get one of these. You'll have it forever if you take care of it, clean it well.
http://www.amazon.com/Tool-Force-A-...p;sr=8-1&keywords=spray+gun+touch+up