Steve, Not sure I agree 100% with your statement about the undercoat before the color. Here is a picture of my 70Z it's unrestored and original paint (hugger orange) norwood car. All I did was clean and new exhaust, but you can see all the undercoat patterns.
I've enjoyed following this post, you've done a Great job and I love all the detail. Keep up the good work and continue to post the pictures.