Is it possible to copy a car?

I've got about four hours in the game and am enjoying it, but I'm confused about something. I've created a car and I want to make a new version of it without losing the initial version. If I do this with the Revise menu option, it changes the default car (unless I'm doing it wrong?) and I can't otherwise figure out how to just clone one car so I can independently change it. Is this possible to do in the current state of the game? Thanks for any help to this newbie 
