The strikers and associated spacers are gold zinc (screws are clear zinc). The latch is part gold zinc, part clear zinc, part natural and difficult to take apart to do all that. There is a big problem with the springs as they get brittle and break if plated. My recommendation is to NOT get the whole assembly plated without removing the springs and rubber bumpers. There is also a problem that after intact plating, the moving parts - won't.
Jim