I just did my 93 Aerostar about a week or so ago, and I have to say I found a winning combo for me. I clayed it, used Color-x, and then a coat of 476s. I am actually getting compliments.
I did my E-150 using clay, paint cleaner, polish, Turtle Wax Platinum, and then finished it off about a week later with 476s. In hindsight I would use clay, Color-x ,and 476s and save hours and have the same or better results. JMO