For one of the rooms in my Spring Fling, I wanted a dark wood floor.  All I had on hand was a sheet of walnut wood flooring.  I cut a larger portion than I needed for the room and taped it to a flat board.

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I brushed on FolkArt Antiquing Medium, covering two or three boards at a time, and then wiped it off immediately.

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There were a few boards that were lighter to begin with, so I added some more antiquing medium and let it sit for a minute or two before wiping away the excess.  It helped it blend a bit more.  After a few minutes, I took a barely damp cloth and wiped the boards again to bring back the grain.

Here it is mostly dry with a scrap of the original walnut next to it, before any finishing sealer.

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I think it's still not as dark as I wanted or maybe just too red for what I'm looking for, but I will let it dry completely before continuing with any additional experimentation.  Either way, now I know how to get a deep cherry wood floor!  :D