It's funny how we approach a project in different ways. I usually follow the instructions point to point without skipping around too much. I also - for the most part - clean all parts first and prime everything together. Painting is also done in batches so the need to use the same color over and over is minimal.
For this build, I have painted all engine parts Tamiya X-18 acrylic. I prefer a black base for metallics and I think they look better that way. I also started working on all body parts, but I'm yet to start sanding the seams. That will be for another day.