I think I did 4 coats of yellow per panel. It was a PITA to get that dark gray covered up and completely gone. I found that the paint may need to dry a bit before the next coat goes on. it seems like the paint kinda slides around on the panels and when it dries a bit that gives the second coat something to stick to. Hope this helps best of luck.
I started painting my interior today. Doing the same style you have but in red.How many coats did you have to do? I am finding that the Fusion isn't going on too well. I cleaned the panels just like I always do when I use Fusion ( I have used it a lot in the past) but I am on my second can and all I have done is the passenger side. I think I need one more coat on the door but the glove box, speaker cover and grab bar plate are done and back in. I'll have to post pics when I finis it.