Here's a '57 that's pearl white/pearl green. The flame template was made by sticking the Scotch Blue painter's tape to a transparency film and printing the pattern onto the tape using an inkjet printer. The pattern was sprayed with clear to seal the ink, and the tape was stuck onto a piece of glass to be cut out. Here's a pic of the the template:
The flames were painted on this piece of styrene with pearl green fading to orange and then purple, with a light pearl white overcoat. Here it is in position on the hood:
To finish the pattern, the template will be cut down the middle and the two halves will be swapped and painted onto the top of the front fenders. After about ten test runs I think I'm brave enough to actually paint the car body. Here goes...