Here is a quote from the net for what it is worth.
Guest
I met a very wise man once who told me I could take an oil or grease stain out of wood with table salt. He was right it worked! I placed a layer of salt over the area and let it sit for a few days, then brused away the salt and repeated this process until the salt pulled all of the oil out of the wood. Be patient this took some time but really did work. I sanded and refished my project in the normal manner and had no problems with my finish.
My other thought is just sand with fine grit paper and,leave the
Aging marks.
Pictures?