Yes all five of your models look great, I bet that XB-70 was a paint hug.
Yes it was, it took 6>7 bottles of Tamiya Acrylic (measure, thin, mix, spray…), at one point I had considered getting a gallon of emulsion & a roller.
Wow I bet it must have felt like it was going to take forever, I think that white is the hardest color to paint, it takes so many coats to get the right level.
My B-36 will be a paint hog of Aluminum, when I finish her.