I wouldn't use a FW for it either but my mom probably would have. She used her FW to re-upholster the couch, mend the pop up camper and you name it and the darn thing still works. Here is a link to a clean up on it my sister and I did a couple years ago. You can see for yourself how beat up the poor machine looks from all the abuse:
http://www.quiltingboard.com/vintage...t-t174236.html