I used silver, really aluminum, dope and then yellow on a Bob Dively SU-2 many years ago. This worked very well. Aluminum is totally opaque so it hides all the color variations in your wood and fillers. Now I use Klass Kote and have been putting down a coat of white before red and yellow. These typically have very low hiding power. The Troublemaker in the photo was done that way.
Chuck
