an interesting link I found, it's about cleaning and restoring a Davis VF, but the means of doing so might make some you twinge,
http://blog.ninapaley.com/2013/10/31...d-restoration/ I have 2 of them that I'm going thru now, one needs the treadle foot and pitman arm, the other will remain electric. They are neat, wish I could find some attachments.