I found an antique wooden bowl in a box of junk my friend was throwing out. It's in great shape-no nicks or chips out of the edging. It's an odd, oval shape that is gorgeous. Very plain and simple. What can I use to clean it that is food safe? What do I polish it up with? I want to leave it on my kitchen table for a bread basket, fruit bowl, etc. It's so lovely, but very dirty. Is Murphy's food safe?