I can see why you would want to work on the finish. I would work on another machine first. I would go to Glenn's profile and read everything he has written. I have a few things on here, too - I get into my mistakes and that might be helpful, too. As far as servicing your machine here is a link:
http://www.quiltingboard.com/vintage...t-t174236.html I'm thinking there is a lot posted on QB about the FW machines.