Couple of wood observations...
The exterior is faux stone-basically pine painted with sand-mix paint to make it look like stone. This looked pretty good.
I noticed that the formal rooms had very rough floorboards with exposed nails. They looked exactly like most old subfloors you see except they weren't run on an angle. This struck me as as odd since the ceilings had intricate plaster mouldings. I would've thought t&g planes would've been fairly common enough to make a better looking floor.
There is a room with faux mahogany paneling. All the wood is pine finished to look like bookmatched mahogany. It looks pretty good until you either look really close or know what real mahogany looks like.
Overall, it is a great trip and if you visit the DC area I would highly recommend it for a great day trip. They have a great museum and grounds tour. The man had a heckuva view of the river!