I found this information a long time ago when I bought my first Featherweight. I followed the directions and it worked beautifully!! Q: What should I use to clean my Featherweight?
A: No simple answer here as itdepends on how dirty it is.
If you have just rescued the machine from a dusty cellar where it has satwithout a case then I'd recommend a gentle foaming cleaner called Tuff Stuff.It's made by STP and should be available at your auto store. I'd recommendwaxing the machine afterwards—neutral boot polish from a Western outfitters isgreat for this. You want a hard wax, not a cream. Don't use a car wax—most ofthese have a degree of abrasive in them designed to remove traffic film—andsome of the paint.
Always test any cleaner on a small, hidden part of a machine first to ensurethere is no unexpected reaction
For regular daily cleaning a simple spray-on furniture polish will do thetrick. But mask off the tension assembly or the polish will build up there andavoid getting too much on the outside of the belt where the bobbin winder wheelruns.
Q: What about cleaning cases?
A: Tuff Stuff to the rescueagain, but follow up with a black boot polish as this will help mask anyrubbing on the case.