Link to Glenn's tutorial:
http://www.quiltingboard.com/vintage...s-t186522.html
Basically if you clean a FW use something that you would use on old shellac finished furniture. It will make spots or take off the finish or decals if you use the wrong stuff to clean. Glenn's method is for any older machine with the shellac clear finish on it. It is easy to do and looks real nice when you are done. Oh and it doesn't take very long.