I have two of mine that have just a blond shellac finish on them, and I like the look. You can do something very similar yourself. Just hit the home center and pick up a spraycan of clear polyurethane -- ask for the solvent-free stuff (mostly solvent-free).

Use masking tape to cover the rear connectors, and stuff some newspaper into the front opening to protect the docking connector, fan, etc..

Hang the dock with a string or small piece of wire through the side or rear holes, and spray on a nice LIGHT coat. Let it dry, and do it again.

After each spray session, turn the spraycan upside down, and press the nozzle for about 2 seconds -- this clears the spray nozzle so it doesn't gum up and waste the rest of the can.

You probably knew most/all of that, but..

Cheers