Good stuff Michael, it's starting to look the part.
I agree with Andy and Kirby re the clear coats. I don't normally use acrylics, but when I do, I apply a primer coat first. Using multiple coats will cause a build-up of paint/clear coats, which could lead to problems around some joints where parts will be attached later, and also clog detail, especially in this small scale.
One thing I would add - try to avoid using cotton wool to fill/mask areas such as wheel wells or cockpits. It has a nasty habit of leaving tiny fibers stuck to the surface, which often can't be seen until it's too late, then show up hugely once the final clear coat has been applied.
Damp tissue works very well, and quickly expands and hardens in the 'filled' area once the paint hits it, creating a very effective mask which is easily removed when done. It's placed in position damp, so as to avoid leaving fibers or paper dust, and this also makes it easier to crush into place.
Some people use soft foam for this purpose, which is equally as effective, but be aware that it can potentially damage delicate parts - for example, control columns or levers inside cockpits - as it is more resistant to folding than the damp tissue method.