Thanks all. I used the Colonial Maple and Tung oil. HOWEVER, setting up the extension table caused some scratching of the black paint. I retouched it but think I need to protect it with a few poly coats. Getting that extension on is going to create wear, so I'm going to have to do my best to try to make it show less.
I got 2 Featherweights last week. I haven't used it/them in this card table set up yet, but am looking forward to giving them a whirl. I spent all day Sat. piecing with one. I still prefer my 301's, but it's a cute machine.