Destructor!!! I hear you. Its been easily over 12 months since I finished this and I have not touched another model. I hope you do decide to dust off the cobwebs mate. I would love to see more of these models customised and re-built.
Ok on to Aztecs.
I started by placing a piece of paper over the hull and traced the pattern of the panels. I had some reference photos whited helped to get a basic pattern. My intention was to then use it as a mask and spray paint with a lighter colour over the base coat.
Once I had the top of the ship marked out, I started to cut away the black parts. I was not as careful as I should have been with this and ended up cutting into the plastic. If I did this again, I would have marked it out on the ship and transferred the tape onto a cutting board to cut out. I ended up doing it this way on the underside. The only issue you will have doing it this way is the tape is less tacky and will start to peel away.