chris-quilts, all I have jused so far is sewing machine oil to clean my machines with. It really takes off the dirt, and doesn't hurt the decals either. Although thinking about that makes me wonder why I worried about that--she has no decals!!
I know you have to be careful with cleaning products. Check out the tutorials available on cleaning. Muv has videos. LostN51 (Billy) has tutes in the archives in this vintage section.