I mask and airbrush carefully, but sometimes you are not going to be able to see any of the roof, but the sides yes. You can also upholster the roof for a bit of extra detailing.
You can also start by looking into some books . . .
Like Pat Covert's, Ken Hamilton's, Terry Jessie, Bill Coulter, and a few others, including (if I may plug it!) Doctor Cranky's book.
It's all good, as they say . . .
It's like magic. AMAZING! You have a great ability to replicate what you see in real life in scale, John. It's a gift, that's for sure. Another beautiful build added to your collection.
LOL! Yes, lots of running back and forth from the LHS, that's what it all means. Suddenly I wished these testors paints would come in larger quantities. But I guess the bright side is you have to plan each paintjob and then the fun is in searching for just the right colors. Or blending your own.