I warped and liquified the metal texture until I got the shape I wanted. I dodged and burned the top part and used a color overlay on the bottom part.
step 2 of 3
After placing the jets, I brightened them up to match the noon time light.
step 3 of 3
Most of the UFO photos I've seen have been not the best quality, so to make it look authentic, I had to make it look like...not the best quality.
I made copies of the original elements, reduced the opacity and nudged them up a bit. I added a small amount of motion blur to the elements that were moving, flattened the whole thing and tilted it.