If it is a real rust bucket, I will pit 240 grit sandpaper in a pad sander and knock off the bad stuff.
Hey Lowell - yep I would do that too...with a bit of lubrication like Windex or WD-40.
I did some more test cuts with this saw last night in maple. Saws great! There's a bit of a catch in it towards the handle when sawing so I may have a wonkey tooth or something. I may refine more or just leave it until the next sharpening. Either way it works much better than it did before the teeth were recut
If you are going to restore old saws, be aware of this site. . . .
https://www.google.com/search?q=tain...hrome&ie=UTF-8
Check this site and get a Taintor saw set. I have five, but the Taintor is the one I use.
https://www.google.com/search?q=tain...hrome&ie=UTF-8
OK - thanks for the tip