In an attempt to smarten up the cheap looking black panels am going to spray paint them. Just need decide on the colour?
I had the red rr8 and painted them and my belly pan red to match. In your examples I'd go blue I think.
Am thinking either blue or white too. Blue makes it look like the tail section joins the tank and having it white makes the lines of the tank cover flow better. The red just looks a bit out of place there