Game Object Selection/Enable & Disable Render

So I'm currently working on a project where I have a scene that has a simple ship for the player to control. What I'm looking to do is to add a UI button that brings up a menu where the player can select a new ship and it will enable the new ship to be rendered while making the render of the previous ship false. I can handle the UI asset but I'm stuck with the render enable/disable.

 

http://docs.unity3d.com/ScriptReference/Renderer-enabled.html