The Mirage system is a 3 part process that comes with 3 cans; a black primer base coat, the colored paint and a clear top coat. To prep it I just cleaned it off with an alcohol soaked paper towel. I let it dry and started painting. Base Coat, Color, Clear: making sure to give it time to bake in the sun to dry before I went on to the next step. This is paint I have had for 7 or 8 years that I had painted some on my 93 Taurus Wagon just going to waste, I know that it may not survive the heat of the engine, but it will only be seen when the hood is up anyway.
JUST A QUICK UPDATE: This morning I went out to run some errands in the Dart with the engine cover on. I was gone a few hours. Came home ate lunch and watched a movie then read the above posts, then went outside after the car sat for approximately 2 hours to check on the condition of the engine cover and it seemed fine. There was no bubbling or peeling, the paint wasn't tacky feeling to the touch. Maybe it'll be fine
I am going to be going to a live WWE event on Sunday in Savannah, which is over an hour drive up and then an hour back at interstate speeds. So this will give me a better indication of how the paint job will perform overall.