Material (hull)

Material was an Alpha Quadrant Alliance designation for the visual appearance of a spacecraft's outer hull, i.e. a vessel's "skin". 

History and specifications
In the early 25th century, any starship class came with a default material applied. This material could be changed by the ship's commanding officer at authorized facilities with shipyards. The default shipyards for the Allied factions were: Earth Spacedock for Federation Starfleet, Praxis Station at Qo'noS for the Klingon Defence Force , the Romulan Flotilla for the Romulan Republic (, and Deep Space 9 for the Dominion's Vanguard Fleet.

Materials were usually designated Type. In addition to a ship's default material options, other materials could become available when a commanding officer had access to other, specific ships. For example, the Aeon material became available to the commanding officer of a  ship if they owned both vessels. 

Applying a deflector shield, like a vanity shield, could override the chosen material option, and replace it with its own visuals. 

List of materials by faction
This is a list of materials, sorted by faction, and sorted as seen in the shipyard. Not all materials are available for each ship in a faction.

Romulan Republic

 * Reman Type 1
 * Romulan Type 1
 * Romulan Type 2
 * Reman Type 2
 * Romulan Type 2 (Brown)
 * Romulan Type 3
 * Romulan Type 4
 * Romulan Veteran
 * Romulan Veteran