I found 6 original Herman Miller Eames DCM chairs on Craigslist a few weeks ago. Two sisters were clearing out their childhood home in Queens. These chairs sat at their dining room table since the early 60's.
Considering their age the chairs were in pretty good shape just very dry, rusty and a little dirty.
I started by disassembling the chairs and sanding off the clear coat. I had to sand each piece by hand because of the curves. Then I used Murphy's Oil Soap to clean off the dusk and any dirt left over.
I also learned that you can soak tin foil in vinegar and rub it along the chime to remove the rust and grime.
Once the pieces were dry I oiled them with Teak Oil.
Before and After
You can see how rich the coloring is once they got a little oil. I chose to not put another clear coat on because I wanted to be able to oil them regularly to keep the wood in good condition.
We used two for our desk
and the other four at the kitchen table.