That is a beautiful machine. Wow! The decals are in really nice shape!!
Billy refers to "Liquid Gold". I just use sewing machine oil for cleaning the machine...inside and out. I just slather it on, let it sit for awhile and then I wipe it off. Then I give it a couple coats of Turtle Wax. For all of the chrome and metal parts (even the brass medallion) I use "No. 7 Chrome & Metal Polish" that I bought at Walmart in the auto section.