I agree with Krigl. The main thing that should be improved is the composition. The plane is pushed away into the corner and it's right on the horizon. To make the shot more interesting, position the plane more towards the center of the pic, but not right in the middle! Also, use a little bank of the plane, in stead of showing it in straight level flight. I don't think the paint is a big problem here. It just needs some highlights. For tips on blending, see my blending tutorial in the library. The jaggies don't look too bad and this will improve as you make more composites. If you have photoshop, make sure you use the pen tool to cut out the plane. Overall, this one is pretty good for a first, so keep it up!
