Hey, check out on Youtube, and look for DupliColour TV. Theres all kinds of how to for the prep and process of doing a whole car interior. There Vinyl and Fabric paint works really well, but most of your work will be in the preparating. Clean the pieces well, and use a good degreaser/prep spray, and you should be good to go. Obviously this will never be as nice as getting a whole new dash, but hey, if you do it well it should look nice. Plus in a few years if it fades or wears then pull it out and touch it up!
Brad