Cosmetics for the components would be nice. They could change the apperaence of guns, the helm, armor, engines and the balloonmachine.
"Worn" for example could add rust to some components like the mortar. The goldlayer on the hwachaheads could be fading (or scaling, don´t know if its the correct word) away. The helmwheel would be missing some spokes and so on.
They could be fitting to the shipthemes allready implemented.