I have had a few folks ask how I weathered the deck so here is how I did it.
I used black, gray, and brown pastel chalk. I first took the brown and using a balled up paper towel I rubbed the chalk on the jet blast deflectors and the area between the catapults and JBD's. I then used same method and did the area's outside the brown areas and down each side of the catapults.
I then used the same method but went over the center of the JBD's and catapults with black. The then made blotches and stains around the entire flight deck. I made a large area around landing wire #3 (This is the wire that the pilots aim for as the perfect landing wire to catch). On this large area I then used eye makeup foam pads and made streaks with black and gray to represent where the aircraft touched down. Mostly near the center of the runway and extending from wire 1 to wire 4 in a diamond pattern centered on wire 3. Finally taking a makeup blush brush I brushed the surface of the flight deck from bow to stern to blend the colors and remove any excess chalk powder. It then gets a dusted spray of matte clear coat 3 times allowing each coat to dry. The a final coat to seal it all. The dusted coats are required because if you spray a seal coat, it will pick up some chalk and give it weird streaks.