Another tip from Bryan at the custom restoration shop... 3M Dry Guide coat. Basically, this stuff is used when sanding your primer. It is a fine black powder, like fingerprinting powder (could be too, 3M makes that as well), that you rub into your primer with a foam applicator. As you sand, any “orange peel”, or voids appear as dark or black spots on your primer! Just continue to sand until they are all gone, and your surface can not get any smoother! (Unless you go to a finer grit).
I just finished sanding the 2nd coat of primer, and this stuff works beautifully! No guessing - especially around details where it is easy to sand too much and lose detail, or too little and leave a rough surface. Next to raised panels, I found that laying some blue painter’s tape allowed me to follow panel lines without eroding them, and the guide coat made sure they were clean and sharp when done!
Under the second layer of primer, I had built up the details with carefully cut pieces of Aluminum tape. Now comes the fun... RIVETS! Each rivet is a drop of what is basically white glue, applied from a hypodermic syringe. You "preload" the syringe with a rubber band placed over the plunger, so the glue comes out at a constant rate. Then you have to get a rhythm, so that each droplet, when placed, is the same size as the rest. I used a piece of paper to get a "Running start" before moving onto the body. When you screw up (and you will), just wipe off with a warm, damp cloth and do it again (and again, and again, and again, and again).